APA
Lang K., National Bureau of Economic Research & Weinstein R. (2013). The Wage effects of not-for-profit and for-profit certifications. Cambridge: NBER.
Chicago
Lang Kevinby, National Bureau of Economic Research and Weinstein Russell. 2013. The Wage effects of not-for-profit and for-profit certifications. Cambridge: NBER.
Harvard
Lang K., National Bureau of Economic Research and Weinstein R. (2013). The Wage effects of not-for-profit and for-profit certifications. Cambridge: NBER.
MLA
Lang Kevinby, National Bureau of Economic Research and Weinstein Russell. The Wage effects of not-for-profit and for-profit certifications. Cambridge: NBER. 2013.