Pulkrabek, Willard W.
Prentice-Hall, 2004
Buku Teks SO
Weijiu, Liu
Springer, 2012
eBooks
Heywood, John
McGraw-Hill, 1989
Buku Teks SO
Pulkrabek, Willard W.
Prentice Hall International, 1997
Buku Teks SO
Heywood, John B
McGraw-Hill, 1988.
Buku Teks SO