@book{54896,
	author = {Beer, Ferdinand Pierre, and DeWolf, John T.},
	title = {Mechanics of materials /},
	publisher = {McGraw-Hill Higher Education,},
	year = {c2006.},
	address = {Boston :},
	edition = {4th ed.},
	url = {www.loc.gov/catdir/enhancements/fy0702/2004058751-t.html}
}