1
by Gillies
Published 2006
2
by Halliday
Published 1992
3
by Morgan
Published 2008
4
by Cunningham
Published 1993
5
by Pearce
Published 1992
6
7
by Martel
Published 1986
8
9
by Lowe
Published 1972
10
11
by Jones
Published 1986
12
by Fromkin
Published 1989
13
by Roberti
Published 1994
14
Published 1993
15
Published 1992
16
17
by Hopwood
Published 1989
18
Published 2001
19
20
Published 1995