Morkuniene, Jurate
Council for Research in Values and Philosophy, 2004
Buku Teks
Hoover, Kenneth R., 1940-, author
Thomson, 2008
Buku Teks
Hoover, Kenneth R., 1940-, author
Thomson, 2004
Buku Teks
Donovan, Todd, author
Wadsworth and Cengage Learning, 2014
Buku Teks
Shiraev, Eric B., author
Pearson/Allyn and Bacon, 2004
Buku Teks