Kenyon, John Samuel, author
Merriam-Webster ; G. & C. Merriam Co., 1953
Buku Referensi
McCarthy, Eugene J., 1916-2005, author
Macmillan, 1962
Buku Teks
Evans, Bergen, 1904-, author
Random House, 1957
Buku Referensi
N. A. L. Signet Books,
Buku Referensi
Franklin, Marc A., author
The Foundation Press, 1968
Buku Teks