Buggy, Hugh
Widescope International, 1977
Buku Teks
Davies, Hugh Sykes
Published for the British Council by Longmans, Green, 1960
Buku Teks
edited by William L. Howarth
Farrar, Straus and Giroux, 1976
Buku Teks
Cameron, J.M., author
British Council, 1884
Buku Teks
Dallek, Robert, author
Little, Brown & Co., 2003
Buku Teks