Hanke, John E.
Pearson-Prentice-Hall, 2009
Buku Teks SO
Bratt, Elmer C.
McGraw-Hill, 1958
Buku Teks
Hanke, Jonh E.
Pearson-Prentice-Hall, 2005
Buku Teks SO
Hanke, John E.
Prentice-Hall, 2001
Buku Teks SO
Grangen, Clive William John, 1934-
Academic Press, 1989
Buku Teks SO