توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

United States. Bureau of the Census. Population Division. (1978). World population, 1977: Recent demographic estimates for the countries and regions of the world. U. S. Government Printing Office.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

United States. Bureau of the Census. Population Division. World Population, 1977: Recent Demographic Estimates for the Countries and Regions of the World. Washington: U. S. Government Printing Office, 1978.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

United States. Bureau of the Census. Population Division. World Population, 1977: Recent Demographic Estimates for the Countries and Regions of the World. U. S. Government Printing Office, 1978.