Skeat, Walter W.
A concise etymological dictionary of the English language
The Clarendon Press, 1948
 Buku Referensi
Weekley, Ernest
An etymological dictionary of modern English : volume II
Dover Publications, 1967
 Buku Referensi
The new modern etymological dictionary
Collins Clear-Type Press, 1960
 Buku Referensi
Mathews, M. M.
Words : how to know them / M. M. Mathews
Henry Holt, 1956
 Buku Teks
Weekley, Ernest
An etymological dictionary of modern English : volume I
Dover Publications, 1967
 Buku Referensi