Nakra, B.C.
Tata McGraw-Hill , 1994
Buku Teks
Bartee, Thomas C., author
McGraw-Hill, 1983
Buku Teks
Townsend, Ralph, author
Butterworth, 1982
Buku Teks
Bartee, Thomas C., author
McGraw-Hill, 1985
Buku Teks
Nashelsky, Louis, author
John Wiley & Sons, 1977
Buku Teks