APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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