@book{1922,
	author = {Allison, Paul David.},
	title = {Event history analysis :},
	publisher = {Sage Publications,},
	year = {1984.},
	series = {Sage university papers. Quantitative applications in the social sciences ;},
	address = {Beverly Hills, Calif. :},
	url = {http://www.loc.gov/catdir/enhancements/fy0658/84051704-d.html}
}