- ^ http://www.scholastic.com/browse/book.jsp?id=340
- ^ "Newbery Medal and Honor Books, 1922-Present". American Library Association. Retrieved 12 December 2012.
- ^ "Past winners". Young Reader's Choice Awards. Retrieved 25 November 2012.
- ^ "Carla Gugino Cast in Mr. Popper's Penguins". ComingSoon.net. Retrieved 2010-09-21.
This content is from Wikipedia. GradeSaver is providing this content as a courtesy until we can offer a professionally written study guide by one of our staff editors. We do not consider this content professional or citable. Please use your discretion when relying on it.