Holt, Jack A., author
Irwin, 1990
Buku Teks
Nelson, Kay Yarborough, author
McGraw-Hill, 1995
Buku Teks
Stultz, Russell A., author
Wordware Publ, 1992
Buku Teks
Andersen, Dick, author
Erlangga, 1986
Buku Teks
Byers, Robert A., author
Ashton-Tate, 1982
Buku Teks