APA (7th ed.) Citation

Knudson, D. M. (1984). Outdoor recreation (rev. ed.). Macmillan.

Chicago Style (17th ed.) Citation

Knudson, Douglas M. Outdoor Recreation. rev. ed. New York: Macmillan, 1984.

MLA (9th ed.) Citation

Knudson, Douglas M. Outdoor Recreation. rev. ed. Macmillan, 1984.