@book{3431,
	author = {Hasan, Arif, and Ahmed, Noman,},
	title = {Karachi :},
	publisher = {Oxford university press},
	year = {2015},
	address = {Karachi},
	url = {http://www.loc.gov/catdir/enhancements/fy1604/2015430021-b.html}
}