Cita APA (7th ed.)

Weeks, J. R. (2012). An introduction to population (Eleventh edition.). Wadsworth, Cengage Learning.

Cita Chicago (17th ed.)

Weeks, John R. An Introduction to Population. Eleventh edition. Australia: Wadsworth, Cengage Learning, 2012.

Cita MLA (9th ed.)

Weeks, John R. An Introduction to Population. Eleventh edition. Wadsworth, Cengage Learning, 2012.