Weeks, J. R. (2002). Population: An introduction to concepts and issues (Eight edition.). Wadsworth/Thomson Learning.
Citazione stile Chigago Style (17a edizione)Weeks, John Robert. Population: An Introduction to Concepts and Issues. Eight edition. Belmont, California: Wadsworth/Thomson Learning, 2002.
Citatione MLA (9a ed.)Weeks, John Robert. Population: An Introduction to Concepts and Issues. Eight edition. Wadsworth/Thomson Learning, 2002.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.