Citazione Stile APA (7a Edizione)

Delfín-Alfonso, C. A., López-González, C. A., & Lara-Díaza, N. E. (2011). The American black bear in northwestern Mexico: Retrieval of occurrence records. Instituto de Ecología, A.C.

Citazione stile Chigago Style (17a edizione)

Delfín-Alfonso, Christian Alejandro, Carlos Alberto López-González, e Nalleli Elvira Lara-Díaza. The American Black Bear in Northwestern Mexico: Retrieval of Occurrence Records. Instituto de Ecología, A.C, 2011.

Citatione MLA (9a ed.)

Delfín-Alfonso, Christian Alejandro, et al. The American Black Bear in Northwestern Mexico: Retrieval of Occurrence Records. Instituto de Ecología, A.C, 2011.