Keyfitz, Nathan
Addison-Wesley Publ., 1968
Buku Teks
Bradley, Stephen P.
Addison-Wesley, 1977
Buku Teks
Ottesen, Johnny T.
Society for Industrial and Applied Mathematics, 2004
eBooks
Academic Press, 1982
Buku Teks
I Gusti Ngurah Agung
Gadjah Mada University Press, 1986
Buku Teks