Merchant, Michael J., author
Wadsworth, 1977
Buku Teks
Monro, Donald M., author
Edward Arnold, 1977
Buku Teks
Grossberg, Alan B., author
McGraw-Hill, 1971
Buku Teks
Jogiyanto H.M. (Hartono M.), author
Andi, 1989
Buku Teks
Kennedy, Michael, author
Prentice-Hall, 1975
Buku Teks