Lyall, K.C.B., author
Macmillan, 1930
Buku Teks
Bryson, John, author
Longman, Green, 1959
Buku Teks
Crabbe, George
Longmans, Green & Co., 1956
Buku Teks
Ribalow, Harold U., author
Twayne, 1945
Buku Teks
Leeming, Glenda, author
Published for the British Council, 1972
Buku Teks