Cita APA (7th ed.)

Weeks, J. R. (2016). Population: An introduction to concepts and issues (Twelfth edition.). Cengage Learning.

Cita Chicago (17th ed.)

Weeks, John Robert. Population: An Introduction to Concepts and Issues. Twelfth edition. Boston, MA, USA: Cengage Learning, 2016.

Cita MLA (9th ed.)

Weeks, John Robert. Population: An Introduction to Concepts and Issues. Twelfth edition. Cengage Learning, 2016.