The writer's digest guide to good writing
Writer's Digest Bokks, 1994
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Reader digest consumer adviser : an action guide to your rights
editor by. James A. Maxwell
The Reader's Digest Association Inc., 1984
 Buku Referensi
Writers digest handbook of magazine article writing
edited by Jean M. fredette
Writers Digest Book, 1990
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Writer's digest Handbook of magazine article writing
edited by Jean M. Fredette
Writer`s Digest Books, 1988
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Vaughn, Lewis
Writing philosophy: a student`s guide to writing philosophy essays
Oxford , 2006
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