Weeks, J. R. (2012). Population: An introduction to concepts and issues (Eleventh edition.). Wadsworth Cengage learning.
芝加哥风格引文Weeks, John Robert. Population: An Introduction to Concepts and Issues. Eleventh edition. Belmont, CA: Wadsworth Cengage learning, 2012.
MLA引文Weeks, John Robert. Population: An Introduction to Concepts and Issues. Eleventh edition. Wadsworth Cengage learning, 2012.
警告：这些引文格式不一定是100％准确.