Graham
Buku Teks
Charles W. Eliot, edited
P. F. Collier & Son Corporation, 1959 ; 1969
Buku Referensi
Firges, Pascal, author
Oxford University Press, 2017
eBooks
Ashgate Publishing Company, 2004
Buku Teks
Arendt, Hannah, 1906-1975, author
Penguin, 1965
Buku Teks