Παραπομπή APA

Weeks,John Robert. (1996). Population: An introduction to concepts and issues (6.). Wadsworth.

Παραπομπή Chicago Style

Weeks,John Robert. Population: An Introduction to Concepts and Issues. 6. Belmont: Wadsworth, 1996.

Παραπομπή MLA

Weeks,John Robert. Population: An Introduction to Concepts and Issues. 6. Wadsworth, 1996.