APA (7th ed.) Citation

Lehrer, J. (1990). Turtles and tortoises. Mallard Press.

Chicago Style (17th ed.) Citation

Lehrer, John. Turtles and Tortoises. New York: Mallard Press, 1990.

MLA (9th ed.) Citation

Lehrer, John. Turtles and Tortoises. Mallard Press, 1990.