Kenyon, John Samuel, author
Merriam-Webster ; G. & C. Merriam Co., 1953
Buku Referensi
Jones, Daniel, author
Cambridge University Press, 2003
Buku Teks
Jones, Daniel, author
Cambridge University Press, 1992
Buku Referensi
Jones, Daniel, author
Everymans`s Reference Library, 1956
Buku Teks SO
edited by Frank O. Colby
Thomas Y. Crowell, 1950
Buku Referensi