Underhill, H.C. (Harry Clay), 1858-1918, author
Bobbs-Merrill , [19--?]
Buku Klasik
edited by Will Kymlicka, Claes Lernestedt, Matt Matravers
Oxford University Press, 2014
Buku Teks
Pageant Publishing, 2018
Majalah, Jurnal, Buletin
Clarkson, C. M. V., author
Fontana , 1995
Buku Teks
Dine, Janet, author
Blackstone Press, 1998
Buku Referensi