Field, D. R., & Machlis, G. E. (2000). National parks and rural development: Practice and policy in the United States. Washington, D.C.: Island Press.
استشهاد بنمط شيكاغوField, Donald R., و Gary E. Machlis. National Parks and Rural Development: Practice and Policy in the United States. Washington, D.C.: Island Press, 2000.
MLA استشهادField, Donald R., و Gary E. Machlis. National Parks and Rural Development: Practice and Policy in the United States. Washington, D.C.: Island Press, 2000.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.