Artikel Jurnal
E. Aminudin Aziz
Indonesia University of Education. Faculty of Language and Art Education, 2005
Artikel Jurnal
edited by E. Stuart Kirby
Dragonfly Books, 1965
Buku Teks
edited by E. Stuart Kirby
Dragonfly Books, 1965
Buku Teks
Chris Rowley ,Yongsun Paik
Routledge, 2009
Buku Teks