Artikel Jurnal
Fowler, H. W. (Henry Watson), 1858-1933
Oxford University Press, 1983
Buku Referensi
Mellinkoff, David
[Publisher not identified], 1992
Buku Teks
Garner, Bryan A.
Oxford University Press, 1995
Buku Referensi
Evans, Bergen, 1904-
Random House, 1957
Buku Referensi