Cita APA

Collar, N. J., & Stuart, S. N. (1985). Threatened birds of Africa and related island (3a. ed.). Cambridge: ICBP, IUCN.

Citación estilo Chicago

Collar, N. J., y S. N. Stuart. Threatened Birds of Africa and Related Island. 3a. ed. Cambridge: ICBP, IUCN, 1985.

Cita MLA

Collar, N. J., y S. N. Stuart. Threatened Birds of Africa and Related Island. 3a. ed. Cambridge: ICBP, IUCN, 1985.