Cita APA (7th ed.)

Weeks, J. R. (2012). Population: An introduction to concepts and issues (Eleventh edition.). Wadsworth Cengage learning.

Cita Chicago (17th ed.)

Weeks, John Robert. Population: An Introduction to Concepts and Issues. Eleventh edition. Belmont, CA: Wadsworth Cengage learning, 2012.

Cita MLA (8th ed.)

Weeks, John Robert. Population: An Introduction to Concepts and Issues. Eleventh edition. Wadsworth Cengage learning, 2012.