Field, D. R., & Machlis, G. E. (2000). National parks and rural development: Practice and policy in the United States. Washington, D.C.: Island Press.
Παραπομπή Chicago StyleField, Donald R., και Gary E. Machlis. National Parks and Rural Development: Practice and Policy in the United States. Washington, D.C.: Island Press, 2000.
Παραπομπή MLAField, Donald R., και Gary E. Machlis. National Parks and Rural Development: Practice and Policy in the United States. Washington, D.C.: Island Press, 2000.
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