Indonesia : the challenge of change
edited by Richard W. Baker [and others]
Institute of Southeast Asian Studies, 1999
 Buku Teks
Challenge and change in the information society
edited by Susan Hornby, Zoe Clarke
Facet, 2004
 Buku Teks
Toynbee, Arnold J.
Change and habit : the challenge of our tim
Oxford University Press, 1966
 Buku Teks
The Challenge of climate change for developing country: Indonesia's case
 Artikel Jurnal
Shriver, Sargent
The challenge and the change=Point of the lance / Sargent Shriver
Pyramid Books, 1965
 Buku Teks