Παραπομπή σε μορφή APA (7η εκδ.)

Weeks, J. R. (2021). Population: An introduction to concepts and issues (Thirteenth edition.). Cengage Learning, Inc.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Weeks, John Robert. Population: An Introduction to Concepts and Issues. Thirteenth edition. Boston, MA, USA: Cengage Learning, Inc, 2021.

Παραπομπή σε μορφή MLA (9th εκδ.)

Weeks, John Robert. Population: An Introduction to Concepts and Issues. Thirteenth edition. Cengage Learning, Inc, 2021.