APA

Flora of North America Editorial Committee, . (1993). Flora of North America. New York, New York, United States: Oxford University.

Chicago

Flora of North America Editorial Committee, . 1993. Flora of North America. New York, New York, United States: Oxford University.

Harvard

Flora of North America Editorial Committee, . (1993). Flora of North America. New York, New York, United States: Oxford University.

MLA

Flora of North America Editorial Committee, . Flora of North America. New York, New York, United States: Oxford University. 1993.