1
by Black
Published 1968
2
3
by Lee, Kuan Yew, 1923-
Published 2013
4
by Corner, E. J. H
Published 1981
5
by Story
Published 1965
6
by Bush
Published 1959
7
by Dilts
Published 1963
8
by Kennedy
Published 1963
9
by Ojong
Published 2001