Abdelrahman Tareq Sadeq Elsharqawy, author
Graduate School of Language and Culture, Osaka University, 2018
Artikel Jurnal
edited by Patricia Clarke and Dale Spender
NSW Allen & Unwin , 1992
Buku Teks
Hobson, Marian
Routledge, 1998
Buku Teks
Auvray, Jean, author
Pergamon Press, 1973
Buku Teks
Salisbury, Harrison E., author
Harper & Row, 1967
Buku Teks