Streusand, Douglas E, author
Westview Press, 2011
Buku Teks
Howkins, Adrian, author
Oxford University Press, 2017
eBooks
Carleton, Patrick, author
E.P. Dutton, 1939
Buku Teks
Eisenstatt, S.N.
Routledge & Kegan Paul, 1954
Buku Teks
Chowdhuri, R. N.
Martinus Nijhoff, 1955
Buku Teks