Andrews, V.C., author
Pocket Books, 2003
Buku Teks
Astrid S. Suryo, author
Jakarta : Yayasan Gebu Minang, 1993,
Buku Referensi
World Bank Indonesia, Social Development Unit, Justice for the Poor Program, 2008
Buku Teks
Lund, Brian
Sage, 2002
Buku Teks
Garber, Stephanie, author
Mizan Fantasi, 2022
Buku Teks