Turner, Bryan S.
Sage, 1983
Buku Teks SO
edited by John A. Kromkowski, Robert R. Magliola and George F. McLean
Council for Research in Values and Philosophie, 2004
Buku Teks SO
Hogan, Michael
Penguin Books, 1987
Buku Teks SO
Demerath, N. J. (Nicholas Jay), 1936-
Random House, 1969
Buku Teks SO
Mary Bryden
Routledge, 2001
Buku Teks SO