^Nohlen, D, Grotz, F & Hartmann, C (2001) Elections in Asia and the Pacific: A Data Handbook: South East Asia, East Asia, and the Pacific Volume 2, p404 ISBN 0-19-924959-8
^Nohlen, D, Grotz, F & Hartmann, C (2001) Elections in Asia and the Pacific: A Data Handbook: South East Asia, East Asia, and the Pacific Volume 2, p403 ISBN 0-19-924959-8