APA
Nichols A., National Bureau of Economic Research & Rothstein J. (2015). The Earned Income Tax Credit (EITC). Cambridge: NBER.
Chicago
Nichols Austin, National Bureau of Economic Research and Rothstein Jesse. 2015. The Earned Income Tax Credit (EITC). Cambridge: NBER.
Harvard
Nichols A., National Bureau of Economic Research and Rothstein J. (2015). The Earned Income Tax Credit (EITC). Cambridge: NBER.
MLA
Nichols Austin, National Bureau of Economic Research and Rothstein Jesse. The Earned Income Tax Credit (EITC). Cambridge: NBER. 2015.