Cita APA (7a ed.)
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.
Cita Chicago Style (17a ed.)
Freytag, George F., y 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.
Cita MLA (9a ed.)
Freytag, George F., y 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.
Precaución: Estas citas no son 100% exactas.