Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Callaway, Jack M., y Elizabeth L. Nicholls. Ancient Marine Reptiles. San Diego: Academic Press, 1997.

Cita MLA (8a ed.)

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