APA (7th ed.) Citation

Walters, D. R., & Keil, D. J. (1996). Vascular plant taxonomy (4th ed., Updated version.). Kendall/Hunt Pub. Co..

Chicago Style (17th ed.) Citation

Walters, Dirk R., and David J. Keil. Vascular Plant Taxonomy. 4th ed., Updated version. Dubuque, Iowa: Kendall/Hunt Pub. Co., 1996.

MLA (9th ed.) Citation

Walters, Dirk R., and David J. Keil. Vascular Plant Taxonomy. 4th ed., Updated version. Kendall/Hunt Pub. Co., 1996.