APA
Ruhm C. J., Black William E & National Bureau Of Economic Research. (2001). Does drinking really decrease in bad times. Cambridge, MA: NBER.
Chicago
Ruhm Christopher J, Black William E and National Bureau Of Economic Research. 2001. Does drinking really decrease in bad times. Cambridge, MA: NBER.
Harvard
Ruhm C. J., Black William E and National Bureau Of Economic Research. (2001). Does drinking really decrease in bad times. Cambridge, MA: NBER.
MLA
Ruhm Christopher J, Black William E and National Bureau Of Economic Research. Does drinking really decrease in bad times. Cambridge, MA: NBER. 2001.