Wood, Anthony, 1923-
Longman, 1983
Buku Teks
Taylor, Alan John Percivale, 1906-1990
Penguin Books in association with Hamish Hamilton, 1967
Buku Teks
Anderson, M.S.
Longman, 1971
Buku Teks
Black, C.E.
Alfred A. Knopf, 1966
Buku Teks
Ashley, Maurice
Frederick A. Praeger, 1969
Buku Teks