Gyula Klima, Fritz Allhoff, Anand Vaidya
BlackWell Publishing, 2007
Buku Teks
edited Muhammad Ali Khalidi
Cambridge, 2005
Buku Teks
Budziszewski, J., author
Cambridge University Press, 2020
eBooks
Artikel Jurnal
Marcucci, Luisa, author
Studio Books , 1960
Buku Referensi