Παραπομπή APA

(1942). Sixteenth census of the United States: 1940. Washington, D.C: Government Printing Office.

Παραπομπή Chicago Style

Sixteenth Census of the United States: 1940. Washington, D.C: Government Printing Office, 1942.

Παραπομπή MLA

Sixteenth Census of the United States: 1940. Washington, D.C: Government Printing Office, 1942.

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