Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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