Adams, Lee, author
Windcrest, 1988
Buku Teks
Evans, James R. (James Robert), 1950-, author
Prentice-Hall, 2002
Buku Teks
Tucker, Allen B., author
Holt Rinehart and Winston, 1983
Buku Teks
Cooper, James W., author
John Wiley & Sons, 1981
Buku Teks
Gehani, Narain, 1947-, author
Prentice-Hall, 1989
Buku Teks