Varma, Vishwanath Prasad, author
Asia Publishing House, 1960
Buku Teks
Kymlicka, Will, author
Clarendon Press, 1990
Buku Teks
Schippers, Birgit, author
Routledge, 2014
Buku Teks
Pojman, Louis P., author
McGraw-Hill , 2003
Buku Teks
Warburton, Nigel, 1962-, author
Routledge, 2000
Buku Teks