@book{21623,
	author = {Rotman, Joseph J.},
	title = {A first course in abstract algebra /},
	publisher = {Prentice Hall,},
	year = {2000},
	address = {Upper Saddle River, NJ:},
	edition = {2nd ed.},
	note = {Includes bibliographical references (p. 519-520) and index}
}