Keyfitz, Nathan, author
Addison-Wesley Publ., 1968
Buku Teks
Keyfitz, Nathan, author
John Wiley & Sons, 1977
Buku Teks
Iannelli, M., author
Society for Industrial and Applied Mathematics, 2005
eBooks
Aris Ananta, author
Lembaga Demografi Fakultas Eekonomi Universitas Indonesia, 1991
Buku Teks
edited by H.S.D. Cole ... [et. al.]
Chatto & Windus for Sussex University Press, 1973
Buku Teks