Hofsfeede, W.M.F
Gadjah Mada University Press, 1991
Buku Teks
edited by Stuart Hampshire ... [et.al.]
Cambridge University Press, 1978
Buku Teks
Zeff, Stephen A.
Stipes Publishing Company, 1972
Buku Teks
Macmillan , 1980
Buku Teks
Reynolds, Lloyd G., author
Prentice-Hall, 1982
Buku Teks