Cutts, Martin
The plain english guide : guide to write clearly and communicate better
Oxford University Press, 1995
 Buku Teks SO
Shurter, Robert L.
Handy grammar reference: a guide to better English / Robert L. Shurter
McGraw-Hill, 1959
 Buku Teks SO
Flesch, Rudolf
A new way to better English
Harper & Brothers, 1958
 Buku Teks SO
Burt, Angela
A Guide to better spelling
Stanley Thornes, 1995
 Buku Referensi
Lewis, Norman
Thirty days to better English/ Norman Lewis,
Doubleday, 1965
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