Toynbee, Arnold J., author
Oxford University Press , 1957
Buku Teks
Toynbee, Arnold J., author
Oxford University Press, 1948
Buku Teks
Cooper, R. W., author
Penguin Books, [c.1947]
Buku Teks
Allen, Edward, author
MIT Press, 969
Buku Teks
McEwen, Indra Kagis
MIT Press, 1993
Buku Teks