APA (7th ed.) Citation

Hamlyn, Campbell, A. C., & Nicholls, J. (1989). The Hamlyn guide to seashores and shallow seas of Britain and Europe. Hamlyn.

Chicago Style (17th ed.) Citation

Hamlyn, A. C. Campbell, and James Nicholls. The Hamlyn Guide to Seashores and Shallow Seas of Britain and Europe. London: Hamlyn, 1989.

MLA (8th ed.) Citation

Hamlyn, et al. The Hamlyn Guide to Seashores and Shallow Seas of Britain and Europe. Hamlyn, 1989.