Hughes, Geoffrey
A history of English words
Blackwell , 2000
 Buku Teks
English words : history and structure / Donka Minkova and Robert Stocwell
Cambridge University Press, 2009
 eBooks
Roget, Peter Mark, 1779-1869
Thesaurus of English words and phrases
Longmans, Green and Co., 1953
 Buku Referensi
Roget, Peter Mark, 1779-1869
Thesaurus of English words and phrases
The World Publishing Company, 1944
 Buku Referensi
Roget, Peter Mark, 1779-1869
Thesaurus of English words and phrases
J. B. Lippincott, 1909
 Buku Referensi