@book{14594,
	author = {Hornsby, John ; Lial ,Margaret  L.},
	title = {A Graphical Approach to Precalculus with Limits: a unit circle approach},
	publisher = {Pearson Educ},
	year = {,2007.},
	address = {Australia:},
	edition = {4th},
	note = {Includes Index}
}