Townsend, Ralph, author
Butterworth, 1982
Buku Teks
Bartee, Thomas C., author
McGraw-Hill, 1985
Buku Teks
Bartee, Thomas C., author
McGraw-Hill, 1972
Buku Teks
Pergamon Press, 1981
Buku Teks
Giarratano, Joseph C., author
Howard W. Sams, 1982
Buku Teks