Bethune, James D., author
Prentice-Hall, 1980
Buku Teks
Traister, John E., author
Reston Publishing , 1979
Buku Teks
Baer, Chales J., author
McGraw-Hill, 1980
Buku Teks SO
Bethune, James D., author
Prentice-Hall, 1990
Buku Referensi
Carmody, Emmett J.
Oklahoma: CAD Press, c1989
Buku Teks