APA
Cook P. J., Hutchinson Rebecca & National Bureau Of Economic Research. (2006). Smoke signals: Adolescent smoking and school continuation. Cambridge, MA: NBER.
Chicago
Cook Philip J, Hutchinson Rebecca and National Bureau Of Economic Research. 2006. Smoke signals: Adolescent smoking and school continuation. Cambridge, MA: NBER.
Harvard
Cook P. J., Hutchinson Rebecca and National Bureau Of Economic Research. (2006). Smoke signals: Adolescent smoking and school continuation. Cambridge, MA: NBER.
MLA
Cook Philip J, Hutchinson Rebecca and National Bureau Of Economic Research. Smoke signals: Adolescent smoking and school continuation. Cambridge, MA: NBER. 2006.