APA (7th ed.) Citation

Oliver, A., & Nicholls, J. (2005). Guide to seashells of the world. Firefly Books Ltd..

Chicago Style (17th ed.) Citation

Oliver, A.P.H, and James Nicholls. Guide to Seashells of the World. New York: Firefly Books Ltd., 2005.

MLA (9th ed.) Citation

Oliver, A.P.H, and James Nicholls. Guide to Seashells of the World. Firefly Books Ltd., 2005.