1
by Grijpstra
Published 1976
2
3
4
by Adnan Haji Nawang
Published 1998
5
by Jomo K.S.
Published 2003
6
7
by Ungku A. Aziz
Published 1975
8
by Mohd. Sohaimi Esa
Published 1999
9
10
by Buchanan
Published 1967
11
12
by Jayasooria
Published 2002
13
14
by Mills
Published 1964
15
16
17
18
Published 2004
19
20