Cita APA

Douglass, R. W. (1982). Forest recreation (3a. ed.). New York: Pergamon Press.

Citación estilo Chicago

Douglass, Robert W. Forest Recreation. 3a. ed. New York: Pergamon Press, 1982.

Cita MLA

Douglass, Robert W. Forest Recreation. 3a. ed. New York: Pergamon Press, 1982.