APA (7th ed.) Citation

Douglass, R. W. (1975). Forest recreation (2d ed.). Pergamon Press.

Chicago Style (17th ed.) Citation

Douglass, Robert W. Forest Recreation. 2d ed. New York: Pergamon Press, 1975.

MLA (9th ed.) Citation

Douglass, Robert W. Forest Recreation. 2d ed. Pergamon Press, 1975.