Harrington, H. J. (H. James), author
McGraw-Hill, 1987
Buku Teks
Robson, Mike, author
Binarupa Aksara, 1994
Buku Teks
charbonneau, Harvey c.
Prentice-Hall, 1978
Buku Teks
Hunt, V. Daniel
Illinois Business One Irwin , 1993
Buku Teks
Samson, Charles
Addison-Wesley , 1970
Buku Teks