Siegel, J. S. and Swanson, D. A. (2004) The Methods and Materials of Demography Siegel, J. S. and Swanson, D. A. (2004). The Methods and Materials of Demography, San Diego: Elsevier.
Preston, S., Patrick H. and Guillot, M. (2001) Demography: Measuring and Modeling Population Processes Preston, S., Patrick H. and Guillot, M. (2001) Demography: Measuring and Modeling Population Processes, Oxford : Blackwell.