APA

Gentry A. H., Vasquez R. & Conservation International.A field guide to the families and genera of woody plants of northwest South America (Colombia, Ecuador, Peru), with supplementary notes on herbaceous taxa. Chicago: University of Chicago Press.

Chicago

Gentry Alwyn H, Vasquez Rodolfo and Conservation International.A field guide to the families and genera of woody plants of northwest South America (Colombia, Ecuador, Peru), with supplementary notes on herbaceous taxa. Chicago: University of Chicago Press.

Harvard

Gentry A. H., Vasquez R. and Conservation International.A field guide to the families and genera of woody plants of northwest South America (Colombia, Ecuador, Peru), with supplementary notes on herbaceous taxa. Chicago: University of Chicago Press.

MLA

Gentry Alwyn H, Vasquez Rodolfo and Conservation International.Chicago: University of Chicago Press. .