Williams III, Frank P., author
Pearson , 2014
Buku Teks
Walsh, Anthony, 1941-, author
Routledge, 2014
Buku Teks
Sage Publications, 2011
eBooks
Matt DeLisi, Kevin M. Beaver, editor
Jones and Bartlett Publishers, 2011
Buku Teks
Lilly, J. Robert, author
Sage Publications, 1995
Buku Teks