APA ציטוט

Clawson, M., & Knetsch, J. L. (1966). Economics of outdoor recreation. Published for Resources for the Future by Johns Hopkins Press.

Chicago Style (17th ed.) Citation

Clawson, Marion, and Jack L. Knetsch. Economics of Outdoor Recreation. Baltimore,: Published for Resources for the Future by Johns Hopkins Press, 1966.

ציטוט MLA

Clawson, Marion, and Jack L. Knetsch. Economics of Outdoor Recreation. Published for Resources for the Future by Johns Hopkins Press, 1966.