Cita APA

Lamar, W. W., & Sasa, M. A new species of hognose pitviper, genus Porthidium, from the southwestern pacific of Costa Rica (Serpentes: Viperidae).

Citación estilo Chicago

Lamar, William W., y Mahmood Sasa. A New Species of Hognose Pitviper, Genus Porthidium, From the Southwestern Pacific of Costa Rica (Serpentes: Viperidae).

Cita MLA

Lamar, William W., y Mahmood Sasa. A New Species of Hognose Pitviper, Genus Porthidium, From the Southwestern Pacific of Costa Rica (Serpentes: Viperidae).