Alosh, Mahdi
Yale University Press, 2000
Buku Teks
Ryding, Karin C, author
Cambridge University Press, 2013
Buku Teks
New York Cambridge University Press 1983,
Buku Teks
Cowan, David, author
Cambridge At The University 1958
Buku Teks
Wehr, Hans, 1909-1981, author
Spoken Language Services, 1976
Buku Referensi