edited by Goib Wiranto
LIPI Press, 2006
Buku Teks
Asia and the Pacific Programme of Educational Innovation for Development, Unesco Regional Office for Education in Asia and the Pacific, 1986
Buku Teks
Her Majesty's Stationery Office, 1987
Buku Teks
Gould, W.T.S.
John Wiley, Longman Scientific, 1993
Buku Teks
edited by Keith Watson
Croom Helm, 1982
Buku Teks