@book{40504,
	author = {Besterfield, Dale H. and O’Hagan, Robert E.},
	title = {Technical sketching with an introduction to 2D and 3D CAD :},
	publisher = {Pearson Prentice Hall,},
	year = {2007},
	address = {Upper Saddle River, N.J. :},
	edition = {4th ed.},
	note = {Includes index}
}