APA aipamena

United Nations. Statistical Office. (1979). World energy supplies, 1973-1978. United Nations.

Chicago Style aipamena

United Nations. Statistical Office. World Energy Supplies, 1973-1978. New York: United Nations, 1979.

MLA aipamena

United Nations. Statistical Office. World Energy Supplies, 1973-1978. United Nations, 1979.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.