APA
Caroll M. E., National Bureau Of Economic Research, . (1998). Income alters the relative reinforcing effects of drug and nondrug reinforcers. Cambridge, MA: NBER.
Chicago
Caroll Marilyn E, National Bureau Of Economic Research, . 1998. Income alters the relative reinforcing effects of drug and nondrug reinforcers. Cambridge, MA: NBER.
Harvard
Caroll M. E., National Bureau Of Economic Research, . (1998). Income alters the relative reinforcing effects of drug and nondrug reinforcers. Cambridge, MA: NBER.
MLA
Caroll Marilyn E, National Bureau Of Economic Research, . Income alters the relative reinforcing effects of drug and nondrug reinforcers. Cambridge, MA: NBER. 1998.