Udall, S. L. (1967). The Potomac: A report on its imperiled future and a guide for its orderly development ;. Washington, D.C: Government Printing Office.
Παραπομπή Chicago StyleUdall, Stewart L. The Potomac: A Report On Its Imperiled Future and a Guide for Its Orderly Development ;. Washington, D.C: Government Printing Office, 1967.
Παραπομπή MLAUdall, Stewart L. The Potomac: A Report On Its Imperiled Future and a Guide for Its Orderly Development ;. Washington, D.C: Government Printing Office, 1967.
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