Cutts, Martin, author
The plain english guide : guide to write clearly and communicate better
Oxford University Press, 1995
 Buku Teks
Furness, Edna L.
Spelling for the millions
Appleton Century , 1964
 Buku Teks
How to write and speak better
Reader's Digest Service, 1987
 Buku Teks
Collins English spelling dictionary
HarperCollins Publishers, 1993
 Buku Referensi
Mudd, Norma
Effective spelling : a practical guide for teachers / Norma Mudd
Hodder & Stoughton Educational , 1998
 Buku Teks
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