Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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