Carr, Joseph J., author
Reston, 1979
Buku Teks
McGraw-Hill Book Comp., 1971
Buku Teks
Buchla, David M., author
Merril, 1992
Buku Teks
Cooper, William D. (William David), author
Erlangga, 1993
Buku Teks
Lenk, John D., author
Prentice-Hall, 1981
Buku Referensi