21
Published 2003
22
23
by Schwartz
Published 1955
24
Published 1962
25
Published 1969
26
by Webster
Published 1961
27
by Wilkinson
Published 1959
28
by Elias
29
by Harley
Published 1944
30
31
Published 1975
32
by Hershfield
Published 1986
33
by Muhammed Salehudin Aman
Published 2008
34
by Muhammed Salehudin Aman
Published 2007
35
36
by Pochhacker
Published 2003
37
by Darwis Harahap Mohamad
Published 2004
38
by Asmah Haji Omar
Published 2004
39
by Ashmah Haji Omar
Published 2004
40
by Hornby
Published 2005