Artikel Jurnal
Macmillan Press , 1998
Buku Teks
Westview Press, 1991
Buku Teks
Bryan, Jeff C., author
CRC Press, Taylor & Francis Group, 2009
Buku Teks
Sudjadnan Parnohadiningrat ... [and others] ; edited by Indriana Kartini
LIPI Press, 2005
Buku Teks