APA
Bulman G. B., National Bureau of Economic Research & Hoxby C. M. (2015). The Returns to the federal tax credits for higher education. Cambridge: NBER.
Chicago
Bulman George B, National Bureau of Economic Research and Hoxby Caroline M. 2015. The Returns to the federal tax credits for higher education. Cambridge: NBER.
Harvard
Bulman G. B., National Bureau of Economic Research and Hoxby C. M. (2015). The Returns to the federal tax credits for higher education. Cambridge: NBER.
MLA
Bulman George B, National Bureau of Economic Research and Hoxby Caroline M. The Returns to the federal tax credits for higher education. Cambridge: NBER. 2015.