APA (7th ed.) Citation

Biro, V. (1980). Gumdrop Finds a Ghost. Penguin Book Ltd.

Chicago Style (17th ed.) Citation

Biro, Val. Gumdrop Finds a Ghost. Penguin Book Ltd, 1980.

MLA (9th ed.) Citation

Biro, Val. Gumdrop Finds a Ghost. Penguin Book Ltd, 1980.

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