Παραπομπή APA

(1978). National urban recreation study: Executive report. Washington, D.C: Government Printing Office.

Παραπομπή Chicago Style

National Urban Recreation Study: Executive Report. Washington, D.C: Government Printing Office, 1978.

Παραπομπή MLA

National Urban Recreation Study: Executive Report. Washington, D.C: Government Printing Office, 1978.

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