@book{40156,
	author = {Stevenson, William J.},
	title = {Operations management /},
	publisher = {McGraw Hill Education,},
	year = {2017 [reprinted 2018]},
	series = {The McGraw-Hill/Irwin series operations and decision sciences},
	address = {Chennai :},
	edition = {Twelfth edition},
	note = {Includes index.}
}