SPIEGELMAN, M. (1968). Introduction to demography, Rev. ed . Harvard U.P.
Cita Chicago (17th ed.)SPIEGELMAN, Mortimer. Introduction to Demography, Rev. Ed . Cambridge, Mass: Harvard U.P, 1968.
Cita MLA (9th ed.)SPIEGELMAN, Mortimer. Introduction to Demography, Rev. Ed . Harvard U.P, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.