APA (7th ed.) Citation

Biro,Val. (1983). Gumdrop at the zoo. Penguin group.

Chicago Style (17th ed.) Citation

Biro,Val. Gumdrop at the Zoo. London: Penguin group, 1983.

MLA (9th ed.) Citation

Biro,Val. Gumdrop at the Zoo. Penguin group, 1983.

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