Weeks, J. R. (2016). Population: An introduction to concepts and issues (Twelfth edition.). Cengage Learning.
Chicago-referens (17:e uppl.)Weeks, John Robert. Population: An Introduction to Concepts and Issues. Twelfth edition. Boston, MA, USA: Cengage Learning, 2016.
MLA-referens (9:e uppl.)Weeks, John Robert. Population: An Introduction to Concepts and Issues. Twelfth edition. Cengage Learning, 2016.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.