Gaya APA

Siegel, J, S., Swanson, D, A. (2004). e-Book The Methods and Materials of Demography (Cet. 2). : Elsevier Academic Press.

Gaya MLA

Siegel, Jacob, S.., Swanson, David, A.. "e-Book The Methods and Materials of Demography". Cet. 2 : Elsevier Academic Press, 2004. Electronic Resource.