Παραπομπή APA

(1962). Participation in outdoor recreation: Factors affecting demand among american adults. Washington, D.C: Outdoor Recreation for America.

Παραπομπή Chicago Style

Participation in Outdoor Recreation: Factors Affecting Demand Among American Adults. Washington, D.C: Outdoor Recreation for America, 1962.

Παραπομπή MLA

Participation in Outdoor Recreation: Factors Affecting Demand Among American Adults. Washington, D.C: Outdoor Recreation for America, 1962.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.