Παραπομπή APA

(1956). Demographic yearbook 1957 : =: Annuaire demographique 1957 : special topic : mortality statistics =. New York: United Nations. Statistical Office.

Παραπομπή Chicago Style

Demographic Yearbook 1957 : =: Annuaire Demographique 1957 : Special Topic : Mortality Statistics =. New York: United Nations. Statistical Office, 1956.

Παραπομπή MLA

Demographic Yearbook 1957 : =: Annuaire Demographique 1957 : Special Topic : Mortality Statistics =. New York: United Nations. Statistical Office, 1956.

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