Harari, Yuval Noah, author
Harper, 2015
Buku Teks
Clements, Jonathan, author
Robinson, 2013
Buku Teks
Vinokur, G.O. (Grigori Osipovich), 1896-1947, author
Cambrigde University Press , 2010
Buku Teks
Artikel Jurnal
Hunter, Wilson William, author
Clarendon Press, 1903
Buku Teks