Weeks, J. R. (2012). Population: An introduction to concepts and issues (Eleventh edition.). Wadsworth Cengage learning.
Chicago-Zitierstil (17. Ausg.)Weeks, John Robert. Population: An Introduction to Concepts and Issues. Eleventh edition. Belmont, CA: Wadsworth Cengage learning, 2012.
MLA-Zitierstil (8. Ausg.)Weeks, John Robert. Population: An Introduction to Concepts and Issues. Eleventh edition. Wadsworth Cengage learning, 2012.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.