Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (8th εκδ.)

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