HPAA, 1984
Buku Teks
Ness, Gayl D.
The John Hopkins University Press , 1984
Buku Teks
Rosen, George, author
Averbury, 1996
Buku Teks
Sen, Amartya, 1933-, author
Institute of southeast Asian Studies, 1999
Buku Teks
edited by Mildred Kaufman
An Aspen Publication, 1990
Buku Referensi