Shurter, Robert L.
Handy grammar reference: a guide to better English
McGraw-Hill, 1959
 Buku Teks SO
Cutts, Martin
The plain english guide : guide to write clearly and communicate better
Oxford University Press, 1995
 Buku Teks SO
Flesch, Rudolf
A new way to better English
Harper & Brothers, 1958
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Burt, Angela
A Guide to better spelling
Stanley Thornes, 1995
 Buku Referensi
Beale, Lucy
The Complete Idiot's Guide to Better Skin
Alpha Books, 2004
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