@book{17,
	author = {Mano, M. Morris.  and Ciletti, Michael D. },
	title = {Digital design /},
	publisher = {PHL learning pvt. ltd.,},
	year = {c2007 [Reprinted 2008].},
	address = {New Delhi :},
	edition = {4th ed.},
	note = {Includes index.}
}