Cita APA (7a ed.)

Gifford, E. M., & Foster, A. S. (1989). Morphology and evolution of vascular plants (3rd ed.). W. H. Freeman and Co..

Cita Chicago Style (17a ed.)

Gifford, Ernest M., y Adriance S. Foster. Morphology and Evolution of Vascular Plants. 3rd ed. New York: W. H. Freeman and Co., 1989.

Cita MLA (8a ed.)

Gifford, Ernest M., y Adriance S. Foster. Morphology and Evolution of Vascular Plants. 3rd ed. W. H. Freeman and Co., 1989.