APA (7th ed.) Citation

Callaway, J. M., & Nicholls, E. L. (1997). Ancient marine reptiles. Academic Press.

Chicago Style (17th ed.) Citation

Callaway, Jack M., and Elizabeth L. Nicholls. Ancient Marine Reptiles. San Diego [u.a.]: Academic Press, 1997.

MLA (9th ed.) Citation

Callaway, Jack M., and Elizabeth L. Nicholls. Ancient Marine Reptiles. Academic Press, 1997.