Cita APA

Savage, J. M., & Heyer, W. R. (1968). The tree-frogs (Family Hylidae) of Costa Rica: Diagnosis and distribution. Universidad de Costa Rica.

Citación estilo Chicago

Savage, Jay M., y W. Ronald Heyer. The Tree-frogs (Family Hylidae) of Costa Rica: Diagnosis and Distribution. Universidad de Costa Rica, 1968.

Cita MLA

Savage, Jay M., y W. Ronald Heyer. The Tree-frogs (Family Hylidae) of Costa Rica: Diagnosis and Distribution. Universidad de Costa Rica, 1968.