Cita APA (7th ed.)
Weeks, J. R. (1989). Population: An introduction to concepts and issues (4th ed.). Wadsworth Pub. Co..
Cita Chicago (17th ed.)
Weeks, John Robert. Population: An Introduction to Concepts and Issues. 4th ed. Belmont, Calif.: Wadsworth Pub. Co., 1989.
Cita MLA (9th ed.)
Weeks, John Robert. Population: An Introduction to Concepts and Issues. 4th ed. Wadsworth Pub. Co., 1989.
Atenció: Aquestes cites poden no estar 100% correctes.