edited by Wendu Nuryanti
Gadjah Mada University Press, 1997
Buku Referensi
Hari Untoro Drajat
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1991
UI - Disertasi Membership
UNDP and ESCAP , 1987
Buku Teks
edited by Lee Bok Y.
McGraw-Hill, 2005
Buku Teks
Muhlbauer, W. Kent.
Gulf Publishing Company, 1992
Buku Referensi