@book{4,
	author = {Christensen, John},
	title = {Africa's Lost Tax Revenue: Lost Development Opportunities},
	publisher = {Tax Justice Network,},
	year = { 2012.},
	series = {Association of Concerned Africa Scholars Bulletin No. 87 Fall 2012},
	address = {United Kingdom: },
	url = {http://iffoadatabase.trustafrica.org/iff/africa’s_lost_tax_revenue.pdf}
}