Norton`s, Peter, author
McGraw-Hill , 2006
Buku Teks
Thomas, A.J.
Pitman and Son , 1967
Buku Teks
Szymansky, Robert A., author
Prentice-Hall, 1995
Buku Teks
Carver, Keith R., author
Wiley, 1983
Buku Teks SO
Carver, Keith R., author
John Wiley & Sons, 1983
Buku Teks SO