1
by Cooke
Published 1993
2
by Argenti
Published 1993
3
4
by Navaratnam
Published 2005
5
Published 2002
6
7
8
by Bogaars
Published 1956
9
by Chay
Published 2002
10
11
by Devadason
Published 1996
12
Published 1999
13
14
Published 1995
15
by Cheong
Published 1990
16
17
Published 2000
18
by Samsiah Muhamad
Published 1983
19
Published 2013
20
Published 2019