1
Published 1997
2
by Gernet
Published 1972
3
by Mohd. Taib Osman
Published 1988
4
by Mohd. Zamberi A. Malek
Published 1994
5
by A. Aziz Deraman
Published 2005
6
by Thesiger
Published 1967
7
by Asrul Zamani
Published 2002