London, J., & Olson, J. (2011). Little penguin: The Emperor of Antarctica. Marshall Cavendish Children's.
Lua i Stíl Chicago (17ú heag.)London, Jonathan, agus Julie Olson. Little Penguin: The Emperor of Antarctica. New York: Marshall Cavendish Children's, 2011.
Lua MLA (8ú heag.)London, Jonathan, agus Julie Olson. Little Penguin: The Emperor of Antarctica. Marshall Cavendish Children's, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.