Cita APA

Duellman, W. E. 1., & Duellman, W. E. 1. (1963). Amphibians and reptiles of the rainforest of Southern El Petén, Guatemala. Lawrence: University of Kansas.

Citación estilo Chicago

Duellman, William Edward 1930-, y William Edward 1930- Duellman. Amphibians and Reptiles of the Rainforest of Southern El Petén, Guatemala. Lawrence: University of Kansas, 1963.

Cita MLA

Duellman, William Edward 1930-, y William Edward 1930- Duellman. Amphibians and Reptiles of the Rainforest of Southern El Petén, Guatemala. Lawrence: University of Kansas, 1963.