Cita APA (7a ed.)

Ahmadjian, V., & Hale, M. E. (1973). The lichens. Academic Press.

Cita Chicago Style (17a ed.)

Ahmadjian, Vernon, y Mason E. Hale. The Lichens. New York [etc.]: Academic Press, 1973.

Cita MLA (9a ed.)

Ahmadjian, Vernon, y Mason E. Hale. The Lichens. Academic Press, 1973.