Cita APA (7a ed.)

Rydberg, P. A. (1932). Flora of the prairies and plains of Central North America. Botanical Garden.

Cita Chicago Style (17a ed.)

Rydberg, Per Axel. Flora of the Prairies and Plains of Central North America. New York: Botanical Garden, 1932.

Cita MLA (9a ed.)

Rydberg, Per Axel. Flora of the Prairies and Plains of Central North America. Botanical Garden, 1932.