APA (7th ed.) Citation

Smith, D. R., & Anderson, A. (1981). Above timberline: A wildlife biologist's Rocky Mountain journal. Knopf.

Chicago Style (17th ed.) Citation

Smith, Dwight R., and Alan Anderson. Above Timberline: A Wildlife Biologist's Rocky Mountain Journal. New York: Knopf, 1981.

MLA (9th ed.) Citation

Smith, Dwight R., and Alan Anderson. Above Timberline: A Wildlife Biologist's Rocky Mountain Journal. Knopf, 1981.