diff --git a/MANUAL.md b/MANUAL.md
index 153bc3d..98ab6d1 100644
--- a/MANUAL.md
+++ b/MANUAL.md
@@ -95,7 +95,10 @@ A test is a file in `yaml` format that can reside anywhere on the filesystem. It
     practice_mode: True
 
     # Show the data structures obtained from the test and the questions
-    debug: True
+    debug: False
+
+    # Show the file and ref field of each question
+    show_ref: True
 
     # -------------------------------------------------------------------------
     # This are the questions database to be imported.
diff --git a/serve.py b/serve.py
index 01d6367..32ff15b 100755
--- a/serve.py
+++ b/serve.py
@@ -146,6 +146,8 @@ def parse_arguments():
     argparser.add_argument('--server', default='conf/server.conf', type=str, help='server configuration file')
     argparser.add_argument('--debug', action='store_true',
         help='Show datastructures when rendering questions')
+    argparser.add_argument('--show_ref', action='store_true',
+        help='Show filename and ref field for each question')
     argparser.add_argument('--show_points', action='store_true',
         help='Show normalized points for each question')
     argparser.add_argument('--show_hints', action='store_true',
@@ -161,7 +163,7 @@ def parse_arguments():
 if __name__ == '__main__':
     # --- parse command line arguments and build base test
     arg = parse_arguments()
-    testconf = test.read_configuration(arg.testfile[0], debug=arg.debug, show_points=arg.show_points, show_hints=arg.show_hints, save_answers=arg.save_answers, practice=arg.practice)
+    testconf = test.read_configuration(arg.testfile[0], debug=arg.debug, show_points=arg.show_points, show_hints=arg.show_hints, save_answers=arg.save_answers, practice=arg.practice, show_ref=arg.show_ref)
 
     print('=' * 79)
     print('- Title:      %s' % testconf['title'])
diff --git a/templates/test.html b/templates/test.html
index 00296dc..0897134 100644
--- a/templates/test.html
+++ b/templates/test.html
@@ -157,7 +157,7 @@
                              Classificar
                         </div>
                         <div class="panel-body" id="example${i}">
-                            <h4> ${i+1}.</h4>
+                            <h4> ${i+1}. </h4>
 
                             <p class="question">
                                 ${pretty(q['text'])}
@@ -253,11 +253,24 @@
                             % endif
 
                         </div> <!-- panel-body -->
-                        % if t['debug']:
+                        % if t['debug'] or t['show_ref']:
                             <div class="panel-footer">
-                            <pre>
-                                ${yaml.dump(q)}
-                            </pre>
+
+                            % if t['debug']:
+                                <pre>
+                                    ${yaml.dump(q)}
+                                </pre>
+                            % endif
+
+                            % if t['show_ref']:
+                                <dl class="dl-horizontal">
+                                <dt>filename:</dt>
+                                <dd>${q['filename']}</dd>
+                                <dt>ref:</dt>
+                                <dd>${q['ref']}</dd>
+                                </dl>
+                            % endif
+
                             </div>
                         % endif
                     </div> <!-- panel -->
diff --git a/test.py b/test.py
index b5355ac..eab81f8 100644
--- a/test.py
+++ b/test.py
@@ -11,7 +11,7 @@ import questions
 import database
 
 # ===========================================================================
-def read_configuration(filename, debug=False, show_points=False, show_hints=False, practice=False, save_answers=False):
+def read_configuration(filename, debug=False, show_points=False, show_hints=False, practice=False, save_answers=False, show_ref=False):
     # FIXME validar se ficheiros e directorios existem???
     if not os.path.isfile(filename):
         print('Cannot find file "%s"' % filename)
@@ -31,6 +31,7 @@ def read_configuration(filename, debug=False, show_points=False, show_hints=Fals
     test['show_points'] = bool(test.get('show_points', show_points))
     test['practice'] = bool(test.get('practice', practice))
     test['debug'] = bool(test.get('debug', debug))
+    test['show_ref'] = bool(test.get('show_ref', show_ref))
     test['save_answers'] = bool(test.get('save_answers', save_answers))
     if test['save_answers']:
         if 'answers_dir' not in test:
--
libgit2 0.21.2