Skeat, Walter W.
The Clarendon Press, 1948
Buku Referensi
Weekley, Ernest
Dover Publications, 1967
Buku Referensi
Collins Clear-Type Press, 1960
Buku Referensi
Mathews, M. M.
Henry Holt, 1956
Buku Teks
Weekley, Ernest
Dover Publications, 1967
Buku Referensi