APA (7th ed.) Citation

Marin, L., Brun, N., & Voinesco, G. (1973). Nature's busy year. Hamlyn.

Chicago Style (17th ed.) Citation

Marin, Lise, Noelle Brun, and Georges Voinesco. Nature's Busy Year. London: Hamlyn, 1973.

MLA (9th ed.) Citation

Marin, Lise, et al. Nature's Busy Year. Hamlyn, 1973.