Weeks, J. R. (1999). Population: An introduction to concepts and issues (Seventh edition.). Wadsworth Publishing, Company.
Chicago-Zitierstil (17. Ausg.)Weeks, John Robert. Population: An Introduction to Concepts and Issues. Seventh edition. Belmont, California: Wadsworth Publishing, Company, 1999.
MLA-Zitierstil (9. Ausg.)Weeks, John Robert. Population: An Introduction to Concepts and Issues. Seventh edition. Wadsworth Publishing, Company, 1999.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.