May, J. Lewis
Geoffrey Bles, 1946
Buku Teks SO
Schoenberg, I.J.
Society for Industrial and Applied Mathematics, 1993
eBooks
Yudi Santoso
Pustaka Promethea, 2001
Buku Teks SO
Brown, Christy
Secker & Warburg, 1976
Buku Teks SO
Long, David
Scribner, 1997
Buku Teks SO