@book{3513,
	author = {Riggs, James L.  and Bedworth, David D. },
	title = {Engineering economics /},
	publisher = {Tata McGraw hill education,},
	year = {c2004 [Reprinted 2010].},
	address = {New Delhi :},
	edition = {4th ed.},
	note = {Include index.}
}