Bonne, Alfred
Buku Teks
Allen, H.B., author
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-, author
Basil Blackwell , 1960
Buku Teks