Cita APA

Ahmadjian, V., Blum, O. B., Brodo, I. M., O. L., G., & Hale, M. E. (1973). The Lichens. New York: Academic Press.

Citación estilo Chicago

Ahmadjian, Vernon, O. B. Blum, Irwin M. Brodo, Gilbert O. L., y Mason E. Hale. The Lichens. New York: Academic Press, 1973.

Cita MLA

Ahmadjian, Vernon, et al. The Lichens. New York: Academic Press, 1973.