Lamar, W. W., & Sasa, M. (2003). A new species of hognose pitviper, genus Porthidium, from the southwestern Pacific of Costa Rica (Serpentes: Viperidae).
استشهاد بنمط شيكاغوLamar, William W., و Mahmood Sasa. A New Species of Hognose Pitviper, Genus Porthidium, From the Southwestern Pacific of Costa Rica (Serpentes: Viperidae). 2003.
MLA استشهادLamar, William W., و Mahmood Sasa. A New Species of Hognose Pitviper, Genus Porthidium, From the Southwestern Pacific of Costa Rica (Serpentes: Viperidae). 2003.
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