Dyfyniad APA
National Bureau of Economic Research, ebrary, Inc, & Gruber, J. (2001). Risky behavior among youths: An economic analysis. University of Chicago Press.
Dyfyniad Arddull Chicago
National Bureau of Economic Research, Inc ebrary, and Jonathan Gruber. Risky Behavior Among Youths: An Economic Analysis. Chicago: University of Chicago Press, 2001.
Dyfyniad MLA
National Bureau of Economic Research, et al. Risky Behavior Among Youths: An Economic Analysis. University of Chicago Press, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.