APA (7th ed.) Citation
Freytag, G. F., & Debouck, D. G. (2002). Taxonomy, distribution, and ecology of the genus phaseolus (Leguminosae-papilionoideae) in North America, Mexico and Central America. Botanical Research Institute of Texas.
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, Mexico and Central America. Botanical Research Institute of Texas, 2002.
MLA (9th ed.) Citation
Freytag, George F., and Daniel G. Debouck. Taxonomy, Distribution, and Ecology of the Genus Phaseolus (Leguminosae-papilionoideae) in North America, Mexico and Central America. Botanical Research Institute of Texas, 2002.
Warning: These citations may not always be 100% accurate.