Rae, Wesley D.
Twayne, 1967
Buku Teks
Samuels, Charles E., author
Twayne, 1965
Buku Teks
Ketton-Cremer, R.W. (Robert Wyndham), 1906-
The British Council by Longmans, Green, 1958
Buku Teks
De Ford, Miriam Allen
Twayne Publishers, 1967
Buku Teks
Price, George R.
Twayne , 1969
Buku Teks