Raybourn, Deanna
PT Gramedia Pustaka Utama, 2015
Buku Teks
Stoppelaar, Cas de
Thomas Rap , 1991
Buku Teks
Dworkin, Ronald
Harvard University Press, 1986
Buku Teks
Dworkin, Ronald
Fontana Press, 1991
Buku Teks
Ohara, Daniel T
Duke University Press, 2003
Buku Teks