APA (7th ed.) Citation

Olson, S. F. (1972). Sigurd F. Olson's Wilderness days ([1st ed.].). Knopf.

Chicago Style (17th ed.) Citation

Olson, Sigurd F. Sigurd F. Olson's Wilderness Days. [1st ed.]. New York: Knopf, 1972.

MLA (9th ed.) Citation

Olson, Sigurd F. Sigurd F. Olson's Wilderness Days. [1st ed.]. Knopf, 1972.