edited by Glenn Morgan, Richard Whitley
Oxford University Press, 2012
Buku Teks SO
edited by Daniel Bell and Irving Kristol
Basic Books, 1971
Buku Teks SO
Arnold, Thurman Wesley
Blue Ribbon Books, 1937
Buku Klasik
Moran, Marie
SAGE, 2015
Buku Teks SO
edited by Susanne Soederberg
Emerald, 2016
eBooks