APA-viite (7. p.)

Graham, J. L., & Hardwood, D. W. (1982). Effectiveness of clear recovery zones. Transportation Research Board.

Chicago-viite (17. p.)

Graham, Jerry L., ja Douglas W. Hardwood. Effectiveness of Clear Recovery Zones. Washington, D.C: Transportation Research Board, 1982.

MLA-viite (9. p.)

Graham, Jerry L., ja Douglas W. Hardwood. Effectiveness of Clear Recovery Zones. Transportation Research Board, 1982.