APA
Freeman R. B., Shen Chia Yu, Jin Emily & National Bureau Of Economic Research. (2004). Where do new US-trained science-engineering PhDs come from?. Cambridge, MA: NBER.
Chicago
Freeman Richard B, Shen Chia Yu, Jin Emily and National Bureau Of Economic Research. 2004. Where do new US-trained science-engineering PhDs come from?. Cambridge, MA: NBER.
Harvard
Freeman R. B., Shen Chia Yu, Jin Emily and National Bureau Of Economic Research. (2004). Where do new US-trained science-engineering PhDs come from?. Cambridge, MA: NBER.
MLA
Freeman Richard B, Shen Chia Yu, Jin Emily and National Bureau Of Economic Research. Where do new US-trained science-engineering PhDs come from?. Cambridge, MA: NBER. 2004.