North-South Institute , 1993
Buku Teks
UNICEF
Unicef, 2002
Buku Teks
Ross, Susan Deller, author
Avon Books, 1973
Buku Teks
Persatuan Kesedaran Komuniti Selangor (EMPOWER), 2012
Buku Teks
Selby, David, author
Cambridge University Press, 1988
Buku Teks