Citace podle APA (7th ed.)

Keyfitz, N. (1990). World population growth and aging: Demographic trends in the late twentieth century. University of Chicago Press.

Citace podle Chicago (17th ed.)

Keyfitz, Nathan. World Population Growth and Aging: Demographic Trends in the Late Twentieth Century. Chicago: University of Chicago Press, 1990.

Citace podle MLA (9th ed.)

Keyfitz, Nathan. World Population Growth and Aging: Demographic Trends in the Late Twentieth Century. University of Chicago Press, 1990.

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