Farmer, Albert John, author
British Council by Longmans, Green, 1966
Buku Teks
Henderson, Philip, author
Longmans, L1956
Buku Teks
Bamborough, J.B., author
Longman, 1959
Buku Teks
Press, John, author
Longman, 1958
Buku Teks
Kay, Dennis, author
Twayne, 1995
Buku Teks