APA (7th ed.) Citation

Busby, A., & Yates, I. The three Billy Goats Gruff. Penguin Books Ltd.

Chicago Style (17th ed.) Citation

Busby, Ailie, and Irene Yates. The Three Billy Goats Gruff. London: Penguin Books Ltd.

MLA (9th ed.) Citation

Busby, Ailie, and Irene Yates. The Three Billy Goats Gruff. Penguin Books Ltd.

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