21
Published 2003
22
by HAMPDEN-TURNER
Published 2000
23
by Mead
Published 2005
24
Published 1997
25
by PUTNIS
Published 1996
26
Published 1991
27
by Varner
Published 1995
28
by LEWIS
Published 1996
29
Published 1994
30
by WALKER
Published 2003
31
by Neuliep, James W.
Published 2018
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32
by Ferraro, Gary P.
Published 2013
33
by Gesteland, Richard R.
Published 2012