21
Published 2006
Available via JSTOR
eBook
22
Published 1994
Available via JSTOR
eBook
23
Published 2004
Available via JSTOR
eBook
24
by Knight, Kelvin.
Published 2007
Book
25
by Marcos, Alfredo.
Published 2012
Available via EBSCO eBook Collection
eBook
30
Published 2013
Available via EBSCO eBook Collection
eBook
35
by McInerny, Ralph, 1929-2010.
Published 1990
Available via JSTOR
eBook