Cita APA (7a ed.)

Crespo, E. G., & Cei, J. M. A. M. (1983). Osteological differences in allopatric populations of the Odontophrynus occidentalis group from Western Argentina.

Cita Chicago Style (17a ed.)

Crespo, E. G., y José Miguel Alfredo María Cei. Osteological Differences in Allopatric Populations of the Odontophrynus Occidentalis Group from Western Argentina. 1983.

Cita MLA (8a ed.)

Crespo, E. G., y José Miguel Alfredo María Cei. Osteological Differences in Allopatric Populations of the Odontophrynus Occidentalis Group from Western Argentina. 1983.