APA (7th ed.) Citation

Mayes, S., Edwards, B., & Pringle, M. (1989). What makes a flower grow? Usborne.

Chicago Style (17th ed.) Citation

Mayes, Susan, Brin Edwards, and Mike Pringle. What Makes a Flower Grow? London: Usborne, 1989.

MLA (9th ed.) Citation

Mayes, Susan, et al. What Makes a Flower Grow? Usborne, 1989.