@book{4257,
	author = {Yusuf, S.M. and Heyd, David E.  - Larson, Ron -Hostetler, Robert P -Edwards, Bruce H.},
	title = {Calculus with Analytical Geometry},
	publisher = {ILmi Kitabkhana},
	year = {2013},
	address = {Lahore},
	edition = {7th ed}
}