Nardo, D. (1991). Population. Lucent Books.
Cita Chicago (17th ed.)Nardo, Don. Population. San Diego, CA: Lucent Books, 1991.
Cita MLA (8th ed.)Nardo, Don. Population. Lucent Books, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)