@book{210148,
	author = {Hellriegel, Don and Slocum, John W.},
	title = {s management a contingency approch /},
	publisher = {McGraw-Hill,},
	year = {1974.},
	address = {New York :},
	note = {"Designed to be used with Modern business management: a systems and environmental approach [by H. G. Hicks and C. R. Gullett]"}
}