Hutcheson, Francis, author
Cambridge University Press, 2014
eBooks
Rachels, James, 1941-2003, author
McGraw-Hill , 2012
Buku Teks
Mikhael Dua, author
Pusat Pengembangan Etika Unika Atma Jaya, 2015
Artikel Jurnal
Umaruddin Masdar, author
Ram-Laijha , 1950
Buku Teks
Engels, Friedrich, 1820-1895, author
Fereign Languages Publishing House, 1954
Buku Teks