Cook, R. C. (1962). Population and food supply. United Nations, Office of Public Information.
Cita Chicago (17th ed.)Cook, Robert Carter. Population and Food Supply. [New York?]: United Nations, Office of Public Information, 1962.
Cita MLA (9th ed.)Cook, Robert Carter. Population and Food Supply. United Nations, Office of Public Information, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.