1
2
by De Fleur, Melvin L.
Published 1988
3
by Sulaiman Zakaria.
Published 1994
4
by Zulkifli Abd. Rahman.
Published 1994
5
by Goldhaber, Gerald M.
Published 1990
6
by Mohd. Hamdan Haji Adnan.
Published 1992
7
by Carnegie, Dale
Published 1997
8
by Sulaiman Masri.
Published 1997
9
by Carnegie, Dale
Published 1989
10
by Bukhory Ismail.
Published 1997
11
Published 1996
12
by Sarbaugh L. E.
Published 1995
13
by Abdullah Hassan
Published 1997
14
by SchrammWilbur.
Published 1992
15
by Zulkifli Yusof
Published 2000
16
by Noraini Mohd. Yusof
Published 1994
17
18
by Decker, Bert.
Published 1993
19
by Severin, Werner J.
Published 1988
20