Keyfitz, Nathan
John Wiley & Sons, 1977
Buku Teks
Iannelli, M.
Society for Industrial and Applied Mathematics, 2005
eBooks
Keyfitz, Nathan
Addison-Wesley Publ., 1968
Buku Teks
Aris Ananta
Lembaga Demografi Fakultas Eekonomi Universitas Indonesia, 1991
Buku Teks
Manton, Kenneth G.
Orlando Academic Press , 1984
Buku Teks