edited by John Wain
Hutchinson, 1979
Buku Teks
Koh, Chang-Soo, author
International Publishing House, 1987
Buku Teks
edited by Stuart Friebert
Longman, 1989
Buku Teks
Gold, Don, author
Chilton, 1967
Buku Teks
edited by Maria Mazziotti Gillan and Jennifer Gillan
Penguin Books, 1994
Buku Teks