APA (7th ed.) Citation

Rydberg, P. A. (1969). Flora of the Rocky Mountains and adjacent plains: Colorado, Utah, Wyoming, Idaho, Montana, Saskatchewan, Alberta, and neighboring parts of Nebraska, South Dakota, North Dakota, and British Columbia (2d ed.). Hafner Pub. Co..

Chicago Style (17th ed.) Citation

Rydberg, Per Axel. Flora of the Rocky Mountains and Adjacent Plains: Colorado, Utah, Wyoming, Idaho, Montana, Saskatchewan, Alberta, and Neighboring Parts of Nebraska, South Dakota, North Dakota, and British Columbia. 2d ed. New York: Hafner Pub. Co., 1969.

MLA (9th ed.) Citation

Rydberg, Per Axel. Flora of the Rocky Mountains and Adjacent Plains: Colorado, Utah, Wyoming, Idaho, Montana, Saskatchewan, Alberta, and Neighboring Parts of Nebraska, South Dakota, North Dakota, and British Columbia. 2d ed. Hafner Pub. Co., 1969.