Sykes, Egerton
London, J.M. Dent and Sons
Buku Referensi
Reinbek bei Hamburg Rowohlt Taschenbuch Verlag GmbH 1988
Buku Teks
Jones, Daniel
Cambridge University Press, 2003
Buku Teks
Jones, Daniel
Cambridge University Press, 1992
Buku Referensi
Kenyon, John Samuel
Merriam-Webster ; G. & C. Merriam Co., 1953
Buku Referensi