Brim, John A.
Holt, Rinehart and Winston, 1974
Buku Teks
Ziman, John, author
Cambridge University Press, 1996
Buku Teks
Kice, John L.
Macmillan Publishing Company, 1974
Buku Teks
Pomeroy, John H.
Holt, Rinehart and Winston, 1964
Buku Teks
Galsworthy, John
Penguin in association with Heinemann, 1967-
Buku Teks