1
Published 2011
2
Published 2012
3
Published 2014
4
5
by Ardichvili, Alexandre
Published 2017
6
Published 2003
7
by Blank,
Published 2001
8
by Mayo,
Published 2005
9
10
by Northouse,
Published 2013
11
by Frayer,
Published 2011
12
13
by Paschen,
Published 2014
14
by Maxwell,
Published 2013
15
16
by Goldsmith,
Published 2010
17
by Ung,
Published 2012
18
Published 2010
19
Published 2000
20
by Murnighan,
Published 2012