@book{1021,
	author = {IIgen, Daniel R. and Ilgen, Daniel R.},
	title = {The changing nature of performance : implications for staffing, motivation, and development. /},
	publisher = {Jossey-Bass Publishers,},
	year = {c1999.},
	address = {San Francisco :},
	edition = {1st ed.},
	url = {http://www.loc.gov/catdir/description/wiley035/98056199.html}
}