edited by Huw Jones
Avebury, 1996
Buku Teks
Vania Ceccato, editor
Springer, 2012
eBooks
Lang, Jon, author
Van Nostrand Reinhold, 1994
Buku Teks
Lang, Jon, author
Van Nostrand Reinhold, 1994
Buku Referensi
The World Bank, [date of publication not identified]
Buku Teks