Thiroux, Jacques P.
Pearson, 2015
Buku Teks SO
Phillips, Robert, 1968-
Berrett-Koehler, 2003
Buku Teks SO
Parker, David
Cambridge University Press, 2011
eBooks
Donaldson, Thomas
Oxford University Press, 1989
Buku Teks SO
edited by Donald Earl Childress III
Cambridge University Press, 2014
Buku Teks SO