Keyfitz, N. (1977). Applied mathematical demography. Wiley.
Cita Chicago (17th ed.)Keyfitz, Nathan. Applied Mathematical Demography. New York: Wiley, 1977.
Cita MLA (9th ed.)Keyfitz, Nathan. Applied Mathematical Demography. Wiley, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.