McLean, W. G.
McGraw-Hill, 1978
Buku Teks
McLean, W. G.
McGraw-Hill, 1983
Buku Teks
John, Robert St
Time Incorporated, 1962
Buku Teks
Sparrow, John, 1906-
Published for the British Council and the National Book League by Longmans, Green & Co, 1992
Buku Teks
Cranfield, John
Sussex Priory Press , 1976
Buku Teks