Hegel,G.W.F
The Boss-Merrill Company, INC, 1953
Buku Teks
Stanford, Michael
Blackwell Publishers, 1998
Buku Teks
Schlegel, Friedrich Von, author
Cambridge University Press, 2015
eBooks
Dray, William H.
Prentice-Hall, 1993
Buku Teks
Ibnu Khaldun, author
Routledge & Kegan Paul, 1958
Buku Teks