Cita APA

Foster, A. S. 1., & Gifford, E. M. 1. (1974). Comparative morphology of vascular plants (2. edition.). San Francisco, Calif.: W.H. Freeman.

Citación estilo Chicago

Foster, Adriance Sherwood 1901-1973, y Ernest M. 1920-2006 Gifford. Comparative Morphology of Vascular Plants. 2. edition. San Francisco, Calif.: W.H. Freeman, 1974.

Cita MLA

Foster, Adriance Sherwood 1901-1973, y Ernest M. 1920-2006 Gifford. Comparative Morphology of Vascular Plants. 2. edition. San Francisco, Calif.: W.H. Freeman, 1974.