Seybold, Patricia B.
McGraw-Hill, 1985
Buku Teks
Ettlin, Walter A., author
McGraw-Hill, 1990
Buku Teks
Buser, Susanne, author
Elex Media Komputindo, 1992
Buku Teks
Lientz, Bannet P.
Times Mirror Mosby College Publishing, 1987
Buku Teks
Taylor, David A
Wiley, 1995
Buku Teks