edited by Don Aikin
George Allen and Unwin, 1985
Buku Teks SO
edited by Henry Mayer
Cheshire, 1973
Buku Teks
Deutsch, Karl Wolfgang, 1912-1992
Houghton Mifflin, 1970
Buku Teks
edited by P. Loveday, A.W. Martin, and R.S. Parker
Hale and Iremonger, 1977
Buku Teks
Lucy, Richard
Macmillan, 1985
Buku Teks