@book{74212,
	author = {Connolly, Thomas M. and Begg, Carolyn E.},
	title = {Database systemsDatabase systems :},
	publisher = {Pearson,},
	year = {2015},
	series = {Always learning},
	address = {Boston :},
	edition = {6th ed.},
	note = {Includes bibliographical references and index.}
}