diff --git a/python/worblehat.py b/python/worblehat.py
index 1f61e8c..0094ff3 100755
--- a/python/worblehat.py
+++ b/python/worblehat.py
@@ -129,7 +129,27 @@ def perform_action(a):
             else:
                 b.series = None
         if 'description' in a: b.description = a['description']
-        # TODO persons, references, pictures
+        if 'persons' in a:
+            for bp in b.persons.all():
+                if bp.person.id not in a['persons'][bp.relation.name]:
+                    bp.delete()
+            for rel, person_list in a['persons'].items():
+                for person_id in person_list:
+                    if person_id not in map(lambda p: p.id, b.get_persons(rel)):
+                        BookPerson(book=b,
+                                   person=Person.objects.get(id=person_id),
+                                   relation=Relation.objects.get(name=rel)).save()
+        if 'references' in a:
+            for ref in b.references.all():
+                if ref.text not in a['references'][ref.reference_type]:
+                    ref.delete()
+            for reftype, text_list in a['references'].items():
+                for text in text_list:
+                    if text not in map(lambda r: r.text, b.references.all()):
+                        Reference(book=b,
+                                  reference_type=ReferenceType.objects.get(name=reftype),
+                                  text=text).save()
+        # TODO pictures
         b.save()
 
 def edit_book_or_person(ids):