edited by Frank O. Colby
Thomas Y. Crowell, 1950
Buku Referensi
MacCarthy, Peter A.
Heffer, 1950
Buku Teks
Kenyon, John Samuel
Merriam-Webster ; G. & C. Merriam Co., 1953
Buku Referensi
Jones, Daniel
Cambridge University Press, 1992
Buku Referensi
Jones, Daniel
Cambridge University Press, 2003
Buku Teks