Keegan, Warren J., author
Prenhallindo , 1996
Buku Teks
by Rafi A. Mohammed [and others]
McGraw-Hill, 2004
Buku Teks
Perreault, William D., author
Irwin McGraw-Hill, 1999
Buku Teks
Keegan, Warren J., author
Prehallindo , 1995
Buku Teks
Dalrymple, Douglas J., author
John Wiley & Sons, 1983
Buku Teks