Haub, C., & Cornelius, D. (2001). 2001 world population data sheet of the Population Reference Bureau: Demographic data and estimates for the countries and regions of the world, book edition. Washington, DC.: Population Reference Bureau.
Chicago Style CitationHaub, Carl, and Diana Cornelius. 2001 World Population Data Sheet of the Population Reference Bureau: Demographic Data and Estimates for the Countries and Regions of the World, Book Edition. Washington, DC.: Population Reference Bureau, 2001.
MLA CitationHaub, Carl, and Diana Cornelius. 2001 World Population Data Sheet of the Population Reference Bureau: Demographic Data and Estimates for the Countries and Regions of the World, Book Edition. Washington, DC.: Population Reference Bureau, 2001.