@book{202,
	author = {Zill,Dennis G.},
	title = {A first course in differential equations with modeling applications /},
	publisher = {Brooks Cole,},
	year = {2013},
	address = {Boston, MA :},
	edition = {10th ed.},
	note = {Includes index},
	url = {http://www.loc.gov/catdir/enhancements/fy1303/2011944307-t.html}
}