Stephen, Revare.
Nexus, 2010
Buku Teks
Yip, Po-Ching, author
Routledge, 2009
Buku Teks
Oosterhoff, Jenneke A., author
Routledge, 2009
Buku Teks
Byon, Andrew Sangpil, author
Routledge, Taylor & Francis Group, 2009
Buku Teks
Spencer, Andrew, author
Blackwell , 1993
Buku Teks