APA (7th ed.) Citation

Campbell, J. A. (1988). The distribucion, variation, natural history, and relationships of Porthidium barbouri (Viperidae). Instituto de Ecología, A.C.

Chicago Style (17th ed.) Citation

Campbell, Jonathan A. The Distribucion, Variation, Natural History, and Relationships of Porthidium Barbouri (Viperidae). Instituto de Ecología, A.C, 1988.

MLA (9th ed.) Citation

Campbell, Jonathan A. The Distribucion, Variation, Natural History, and Relationships of Porthidium Barbouri (Viperidae). Instituto de Ecología, A.C, 1988.