APA (7th ed.) Citation
Freytag, G. F., & Debouck, D. G. (2003). Taxonomy, distribution, and ecology of the genus Phaseolus (Leguminosae–Papilionoideae) in North America, México and Central America.
Chicago Style (17th ed.) Citation
Freytag, George F., and Daniel G. Debouck. Taxonomy, Distribution, and Ecology of the Genus Phaseolus (Leguminosae–Papilionoideae) in North America, México and Central America. 2003.
MLA (9th ed.) Citation
Freytag, George F., and Daniel G. Debouck. Taxonomy, Distribution, and Ecology of the Genus Phaseolus (Leguminosae–Papilionoideae) in North America, México and Central America. 2003.
Warning: These citations may not always be 100% accurate.