International Bank for Reconstruction and Development.
The World Bank, 2006
Buku Teks
edited by Tessa Hebb
Springer, 2012
eBooks
edited by Hillol Kargupta
CRC Press, Taylor & Francis Group, 2009
Buku Teks SO
López, Ana Belen Cristobal
Springer, 2012
eBooks
Harrington, H. James
McGraw-Hill, 1995
Buku Teks