APA
Babcock P., Betts Julian R & National Bureau Of Economic Research. (2009). Reduced-class distinctions: Effort, ability, and the educati. Cambridge: NBER.
Chicago
Babcock Philip, Betts Julian R and National Bureau Of Economic Research. 2009. Reduced-class distinctions: Effort, ability, and the educati. Cambridge: NBER.
Harvard
Babcock P., Betts Julian R and National Bureau Of Economic Research. (2009). Reduced-class distinctions: Effort, ability, and the educati. Cambridge: NBER.
MLA
Babcock Philip, Betts Julian R and National Bureau Of Economic Research. Reduced-class distinctions: Effort, ability, and the educati. Cambridge: NBER. 2009.
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