21
by Ferrater Mora, Jose, 1912-
Published 1960
22
23
by Ziglar, Zig.
Published 1993
24
by Najib Ahmad Marzuki
Published 2007
25
by Patterson, Wayne A.
Published 1994
26
by Khoo, Kheng-Hor, 1956-
Published 2006
27
Published 1999
28
29
by Ainon Mohd, 1950-
Published 1997
30
by Leo, Ann Mean
Published 2006
31
by Novak, Michael
Published 1965
32
by Abdullah b. Mohamed
Published 1980
33
34
Published 1974
35
by Huberman, Edward
Published 1962
36
by Hasan Muhd Hj. Al Khair
Published 2005
37
by Heidegger, Martin
Published 1956
38
by Abdul Rahman Aziz
Published 2001
39
by Sciacca, Michele Federico
Published 1964
40