Boyd & Fraser , 1991
Buku Teks
Rowley, E. Jennifer, author
Clive bingley, 1990
Buku Teks
Satzinger, John W., author
Course Tecnology Cengage, 2012
Buku Teks
Berk, Joseph, author
ASM International, 2009
eBooks
Avison, David, author
McGraw-Hill, 2008
Buku Teks