APA (7th ed.) Citation

Oliver, A. P. H., & Nicholls, J. (1975). Guide to shells.

Chicago Style (17th ed.) Citation

Oliver, A. P. H., and James Nicholls. Guide to Shells. 1975.

MLA (9th ed.) Citation

Oliver, A. P. H., and James Nicholls. Guide to Shells. 1975.

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