BibTeX for "PSAgraphics: An R Package to Support Propensity Score Analysis"

@article{Helmreich:Pruzek:2008:JSSOBK:v29i06,
  author =	"James E. Helmreich and Robert M. Pruzek",
  title =	"PSAgraphics: An R Package to Support Propensity Score Analysis",
  journal =	"Journal of Statistical Software",
  volume =	"29",
  number =	"6",
  pages =	"1--23",
  day =  	"20",
  month =	"2",
  year = 	"2009",
  CODEN =	"JSSOBK",
  ISSN = 	"1548-7660",
  bibdate =	"2008-12-22",
  URL =  	"http://www.jstatsoft.org/v29/i06",
  accepted =	"2008-12-22",
  acknowledgement = "",
  keywords =	"",
  submitted =	"2008-09-24",
}