Vanguard Press, 1963
Buku Teks
Edwards, Philip, author
British Council by Longmans, Green, 1970
Buku Teks
Jeffares, A. Norman
Stanford University Press, 1968
Buku Teks
Hands, Timothy
Macmillan, 1989
Buku Teks
Bradbrook, M.C. (Muriel Clara), 1909-1993, author
Longmans, 1958
Koleksi Publik