@book{8323,
	author = {Connolly, Thomas M. and Begg,Carolyn},
	title = { Database Systems :},
	publisher = {Pearson,},
	year = {2015.},
	address = {Boston :},
	edition = {6th ed.},
	url = {https://books.google.com.pk/books/about/Database_Systems.html?id=aM5QAAAAMAAJ&source=kp_book_description&redir_esc=y}
}