@book{16,
	author = {Hisrich, Robert D. and Peters, Michael P.},
	title = {Entrepreneurship /},
	publisher = {NBF,},
	year = {N.D.},
	address = {Islamabad :},
	edition = {7th ed.},
	note = {P.B},
	url = {http://www.loc.gov/catdir/toc/ecip0615/2006018889.html}
}