New Webster's dictionary
Groiler
Grolier Incorporated, 1992
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Webster's new biographical dictionary
Merriam-Webster Inc., 1988
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Webster's new collegiate dictionary
G & C Merriam Co., 1961
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The new Webster's dictionary
Lexicon Publication, 1993
Buku Referensi
New webster's dictionary of the english language
Delair , 1981
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