APA aipamena

United Nations. Statistical Office. (1951). Demographic yearbook 1951. Statistical Office of the United Nations.

Chicago Style aipamena

United Nations. Statistical Office. Demographic Yearbook 1951. Dept.of.Economic Affairs: Statistical Office of the United Nations, 1951.

MLA aipamena

United Nations. Statistical Office. Demographic Yearbook 1951. Statistical Office of the United Nations, 1951.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.