Hryniewicz, Waclaw
Council for Research in Values and Philosophy, 2007
Buku Teks
Winzeler, Robert L.
Lanham Rowman & Littlefield, 2016
Buku Teks SO
Storey, John, 1950-
Prentice-Hall, 2000
Buku Teks
McRobbie, Angela
Routledge, 1996
Buku Teks
Editor by Allen Ellis
The Hawarth Press, 1992
Buku Teks