Skeat, Walter W.
A concise etymological dictionary of the English language
The Clarendon Press, 1948
 Buku Referensi
Meyer-Lubke, W.
Romanisches Etymologisches worterbuch
Carl Winter's Universitatsbuchhandlung, 1935
 Buku Referensi
Gamillscheg, Ernst
Etymologisches worterbuch der franzosischen sprache
Carl Winter's Universitatsbuchhandlung, 1928
 Buku Referensi
Burrow, T.
A Dravidian etymological dictionary
Clarendon Press, 1961
 Buku Referensi
Preobrazhensky, A. G.
Etymological dictionary of the Russian language
Columbia University Press, 1951
 Buku Referensi