Paper  bibtex   

@techreport{RN294,
   author = {Campbell, B. J.},
   title = {The Relationship of Seat Belt Law Enforcement to Level of Belt Use},
   institution = {UNC Highway Safety Research Center},
   number = {HSRC-TR72},
   month = {1987/06},
   url = {https://trid.trb.org/view.aspx?id=285449},
   year = {1987},
   type = {Report}
}