Cita APA (7th ed.)

Weeks, J. R. (1999). Population: An introduction to concepts and issues (Seventh edition.). Wadsworth Publishing, Company.

Cita Chicago (17th ed.)

Weeks, John Robert. Population: An Introduction to Concepts and Issues. Seventh edition. Belmont, California: Wadsworth Publishing, Company, 1999.

Cita MLA (9th ed.)

Weeks, John Robert. Population: An Introduction to Concepts and Issues. Seventh edition. Wadsworth Publishing, Company, 1999.