Παραπομπή APA

(1970). Environmental quality: The first annual report. Washington, D.C: Government Printing Office.

Παραπομπή Chicago Style

Environmental Quality: The First Annual Report. Washington, D.C: Government Printing Office, 1970.

Παραπομπή MLA

Environmental Quality: The First Annual Report. Washington, D.C: Government Printing Office, 1970.

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