Starkey, Paul
Edinburgh University Press, 2006
Buku Teks
E. J. Brill,
Majalah, Jurnal, Buletin
Cowan, David
Cambridge At The University , 1958
Buku Teks
Abboud, Peter F
Cambridge University Press, 1983
eBooks
Wehr, Hans, 1909-1981
Spoken Language Services, 1976
Buku Referensi