Kenyon, John Samuel, author
Merriam-Webster ; G. & C. Merriam Co., 1953
Buku Referensi
editor, William Morris
Houghton Miffiln, 1976
Buku Referensi
Buku Referensi
Taylor, Grant
Saxon Press, 1956
Buku Teks
Victoria Neufeldt, David B. Guralnik, editor
Webster's New World, 1988
Buku Referensi