(1949). The economics of public recreation: An economic study of the monetary evaluation of recreation in the national parks. Land and Recreational Planning Division, National Park Service.
Chicago-Zitierstil (17. Ausg.)The Economics of Public Recreation: An Economic Study of the Monetary Evaluation of Recreation in the National Parks. Washington: Land and Recreational Planning Division, National Park Service, 1949.
MLA-Zitierstil (9. Ausg.)The Economics of Public Recreation: An Economic Study of the Monetary Evaluation of Recreation in the National Parks. Land and Recreational Planning Division, National Park Service, 1949.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.