Cita APA (7a ed.)

London, J., & Olson, J. (2011). Little penguin: The Emperor of Antarctica. Marshall Cavendish Children's.

Cita Chicago Style (17a ed.)

London, Jonathan, y Julie Olson. Little Penguin: The Emperor of Antarctica. New York: Marshall Cavendish Children's, 2011.

Cita MLA (8a ed.)

London, Jonathan, y Julie Olson. Little Penguin: The Emperor of Antarctica. Marshall Cavendish Children's, 2011.