Steinhauer, Hein
Europe: so many languages, so many cultures
Faculty of Humanities University of Indonesia, 2011
 Artikel Jurnal
Nippon 1994/95 : a charted survey of Japan / edited by The Tsuneta Yano Memorial Society
The Kokusei-Sha, 1994
 Buku Teks
Katzner, Kenneth
The languages of the world
Routledge, 1995
 Buku Referensi
Languages & Literatures
Peter Lang International Academic Publishin Group, 2010
 Majalah, Jurnal, Buletin
Sign languages
edited by Diane Brentari
Cambridge University Press, 2010
 eBooks