@book{6236,
	author = {KATZ, H. C. and KOCHAN, T. A., COLVIN, A. J. S.},
	title = {An Introduction to collective Bargaining and Industrial Relations.},
	publisher = {Mc Graw-Hill Irwin,},
	year = {2008.},
	address = {New York,},
	edition = {4th Ed.}
}