Fenstermaker, J. Van
Meredith , 1969
Buku Teks SO
Goldsmith, Raymond W.
Columbia University Press , 1965
Buku Teks
Dougall, Herbert E.
Prentice-Hall, 1970
Buku Teks SO
Ray, George E.
Prentice-Hall, 1972
Buku Teks SO
Dominguez, John R.
Lexington Books , 1974
Buku Teks