Webster's II: new riverside pocket dictionary
Houghton Miffin, 1991
 Buku Referensi
Webster's new collegiate dictionary : fifth edition
G & C Merriam Co., 1947
 Buku Referensi
New Webster's dictionary of the English language : college edition
Delair Publishing Company, 1981
 Buku Referensi
Webster's new collegiate dictionary : based on Webster's new international dictionary : second edition
G & C Merriam Co., 1951
 Buku Referensi
THe New Lexicon Webster's Dictionary of the English Language Volume 1(Encyclopedic Edition)
Danbury : Lexicon Publications, Inc., 2004,
 Buku Referensi