APA (7th ed.) Citation

Wahl, J. (1980). Old Hippo's Easter egg. Harcourt Brace Jovanovich.

Chicago Style (17th ed.) Citation

Wahl, Jan. Old Hippo's Easter Egg. New York, London: Harcourt Brace Jovanovich, 1980.

MLA (9th ed.) Citation

Wahl, Jan. Old Hippo's Easter Egg. Harcourt Brace Jovanovich, 1980.

Warning: These citations may not always be 100% accurate.