APA
Oreopoulos P., National Bureau of Economic Research & Ford R. (2016). Keeping college options open. Cambridge: NBER.
Chicago
Oreopoulos Philip, National Bureau of Economic Research and Ford Reuben. 2016. Keeping college options open. Cambridge: NBER.
Harvard
Oreopoulos P., National Bureau of Economic Research and Ford R. (2016). Keeping college options open. Cambridge: NBER.
MLA
Oreopoulos Philip, National Bureau of Economic Research and Ford Reuben. Keeping college options open. Cambridge: NBER. 2016.