Bube, Richard H.
Academic Press, 1981
Buku Teks SO
Boyer, Ralph E.
St. Paul Minn, 1991
Buku Teks SO
Clout, Hugh D.
Pergamon Press, 1977
Buku Teks SO
Robin, R.H. [Robert Henry]
Longman, 1980
Buku Teks SO
The Japan Foundation
The Japan Foundation, 1974
Buku Teks