Roget's international thesaurus : third edition
Thomas Y. Crowell Company, 1962
 Buku Referensi
Roget's international thesaurus : fifth edition
edited by Robert L. Chapman
Harper Collins Publishers, 1992
 Buku Referensi
Longman dictionary of the English language
Longman, 1984
 Buku Referensi
The universal dictionary of the English language
edited by Henry Cecil
George Routledge & Sons, 1946
 Buku Referensi
New webster's dictionary of the english language
Delair , 1981
 Buku Teks
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