APA (7th ed.) Citation

Lynch, W. (2007). Penguins of the world (2nd ed.). Firefly Books.

Chicago Style (17th ed.) Citation

Lynch, Wayne. Penguins of the World. 2nd ed. Richmond Hill, Ont.: Firefly Books, 2007.

MLA (9th ed.) Citation

Lynch, Wayne. Penguins of the World. 2nd ed. Firefly Books, 2007.