Greyser, Stephen A.
Prentice-Hall, 1972
Buku Teks
Norris, James S., author
Prentice-Hall, 1980
Buku Teks
Nicosia, Francesco
McGraw-Hill, 1974
Buku Teks
Nicosia, Francesco M.
McGraw-Hill, 1974
Buku Teks
Weilbacher, William M.
Macmillan, 1981
Buku Teks