1
2
by Sugarman
Published 1992
3
by Halliday
Published 1992
4
by Brown
Published 2008
5
by Martel
Published 1986
6
7
8
by Billig
Published 1992
9
by Fromkin
Published 1989
10
11
by Roberti
Published 1994
12
13
Published 1990
14
by James
Published 2008
15
16
Published 1995
17
by Hopwood
Published 1989
18
Published 2001
19
20
by Ali
Published 1996