- ^ Weekly Reader Books presents Mr. Popper's penguins. OCLC. OCLC 11447859.
- ^ Mr. Popper's penguins. OCLC. OCLC 17265673.
- ^ Mr. Popper's penguins : a pop-up book. OCLC. OCLC 26096633.
- ^ Mr. Popper's penguins. OCLC. OCLC 44579495.
- ^ "Mr. Popper's Penguins". www.commonsensemedia.org. Common Sense Media Inc. Retrieved 24 September 2015.
- ^ "Mr. Popper's Penguins". www.kirkusreviews.com. Kirkus Media LLC. 1 September 1938. Retrieved 24 September 2015.
- ^ "Mr. Popper's Penguins". www.publishersweekly.com. PWxyz LLC. Retrieved 11 December 2020.
- ^ "Newbery Medal and Honor Books, 1922-Present". American Library Association. Retrieved 12 December 2012.
- ^ "Past winners". Young Reader's Choice Awards. Archived from the original on 29 October 2012. Retrieved 25 November 2012.
- ^ "Carla Gugino Cast in Mr. Popper's Penguins". ComingSoon.net. Retrieved 2010-09-21.
- ^ "Eliot Schrefer on The Popper Penguin Rescue". Hachette Book Group. 17 June 2020. Retrieved October 6, 2020.
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