@book{8973,
	author = {Datta, S. C. and Datta,Sudha},
	title = {Practical English Grammar },
	publisher = {Paramount Book Publisher,},
	year = {1997.  },
	address = {Karachi},
	url = {http://www.amazon.com/exec/obidos/ASIN/8170416183/chopaconline-20}
}