Allen, H.B.
Cornell University Press, 1953
Buku Teks
Royal Institute of International Affairs, 1954
Buku Teks
edited by Peter Mansfield
Oxford University Press, 1973]
Buku Teks
Sen, Amartya, 1933-
Basil Blackwell , 1960
Buku Teks
Henry, Clement M., 1937-
Cambridge University Press, 2010
Buku Teks