Kurbegov, Eliane, author
McGraw-Hill, 2012
Buku Teks
Yozua Makes, author
Makes & Partners, 2014
Artikel Jurnal
Clift, Rebecca, author
Cambridge University Press, 2016
Buku Teks
Asher, Nicholas, author
Cambridge University Press, 2003
Buku Teks
edited by Hedwig te Molder, Jonathan Potter
Cambridge University Press, 2005
Buku Teks