editor Derek Bingham
John Catt Educational, 1994
Buku Referensi
Steinhauer, Hein, author
Faculty of Humanities University of Indonesia, 2011
Artikel Jurnal
The Kokusei-Sha, 1994
Buku Teks
Katzner, Kenneth, author
Routledge, 1995
Buku Referensi
Peter Lang International Academic Publishin Group, 2010
Majalah, Jurnal, Buletin