London, Keith R., author
Petrocelli Books, 1974
Buku Teks
Waters, S. J., author
NCC Publications, 1979
Buku Teks
Long, Larry E., author
Reston Publishing, 1979
Buku Teks
Horton, William, author
John Wiley & Sons, 1994
Buku Teks
Martin, James, author
Prentice-Hall, 1973
Buku Teks