APA (7th ed.) Citation

Hader, B., & Hader, E. (1951). Lost in the zoo. Macmillan.

Chicago Style (17th ed.) Citation

Hader, Berta, and Elmer Hader. Lost in the Zoo. New York: Macmillan, 1951.

MLA (9th ed.) Citation

Hader, Berta, and Elmer Hader. Lost in the Zoo. Macmillan, 1951.