APA (7th ed.) Citation

Biro, V. (1984). Gumdrop gets his wings / story and pictures by Val Biro. Penguin.

Chicago Style (17th ed.) Citation

Biro, Val. Gumdrop Gets His Wings / Story and Pictures by Val Biro. Harmondsworth: Penguin, 1984.

MLA (9th ed.) Citation

Biro, Val. Gumdrop Gets His Wings / Story and Pictures by Val Biro. Penguin, 1984.

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