Martin, James, author
Prentice-Hall, 1973
Buku Teks
Olsson, Gustaf, author
Prentice-Hall, 1992
Buku Teks
Buck, John R., author
Prentice-Hall, 2002
Buku Teks
Wing, Omar, author
Holt, Rinehart and Winston, 1972
Buku Teks
Shave, M.J.R.
Addison-Wesley Pub. Co., 1982
Buku Teks