@book{55614,
	author = {Johnsonbaugh, Richard},
	title = {Discrete mathematics /},
	publisher = {Pearson Prentice Hall,},
	year = {c2005},
	series = {The JK computer science and mathematics series},
	address = {Upper Saddle River, N.J. :},
	edition = {6th ed. (inter ed.)}
}