diff --git a/cps/db.py b/cps/db.py
index 95b5d366..fb1d5c57 100644
--- a/cps/db.py
+++ b/cps/db.py
@@ -100,41 +100,49 @@ class Identifiers(Base):
         self.book = book
 
     def formatType(self):
-        if self.type == "amazon":
+        format_type = self.type.lower()
+        if format_type == 'amazon':
             return u"Amazon"
-        elif self.type == "isbn":
+        elif format_type.startswith("amazon_"):
+            return u"Amazon.{0}".format(format_type[7:])
+        elif format_type == "isbn":
             return u"ISBN"
-        elif self.type == "doi":
+        elif format_type == "doi":
             return u"DOI"
-        elif self.type == "goodreads":
+        elif format_type == "douban":
+            return u"Douban"
+        elif format_type == "goodreads":
             return u"Goodreads"
-        elif self.type == "google":
+        elif format_type == "google":
             return u"Google Books"
-        elif self.type == "kobo":
+        elif format_type == "kobo":
             return u"Kobo"
-        if self.type == "lubimyczytac":
+        if format_type == "lubimyczytac":
             return u"Lubimyczytac"
         else:
             return self.type
 
     def __repr__(self):
-        if self.type == "amazon" or self.type == "asin":
+        format_type = self.type.lower()
+        if format_type == "amazon" or format_type == "asin":
             return u"https://amzn.com/{0}".format(self.val)
-        elif self.type == "isbn":
+        elif format_type.startswith('amazon_'):
+            return u"https://amazon.{0}/{1}".format(format_type[7:], self.val)
+        elif format_type == "isbn":
             return u"https://www.worldcat.org/isbn/{0}".format(self.val)
-        elif self.type == "doi":
+        elif format_type == "doi":
             return u"https://dx.doi.org/{0}".format(self.val)
-        elif self.type == "goodreads":
+        elif format_type == "goodreads":
             return u"https://www.goodreads.com/book/show/{0}".format(self.val)
-        elif self.type == "douban":
+        elif format_type == "douban":
             return u"https://book.douban.com/subject/{0}".format(self.val)
-        elif self.type == "google":
+        elif format_type == "google":
             return u"https://books.google.com/books?id={0}".format(self.val)
-        elif self.type == "kobo":
+        elif format_type == "kobo":
             return u"https://www.kobo.com/ebook/{0}".format(self.val)
-        elif self.type == "lubimyczytac":
+        elif format_type == "lubimyczytac":
             return u" https://lubimyczytac.pl/ksiazka/{0}".format(self.val)
-        elif self.type == "url":
+        elif format_type == "url":
             return u"{0}".format(self.val)
         else:
             return u""