Παραπομπή APA

(1980). World population 1979: Recent demographic estimates for the countries and regions of the world. Washington: Government Printing Office.

Παραπομπή Chicago Style

World Population 1979: Recent Demographic Estimates for the Countries and Regions of the World. Washington: Government Printing Office, 1980.

Παραπομπή MLA

World Population 1979: Recent Demographic Estimates for the Countries and Regions of the World. Washington: Government Printing Office, 1980.

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