APA
Chen C., National Bureau of Economic Research, Knittel C. R. & Hu W. M. (2017). Subsidizing fuel efficient cars. Cambridge: NBER.
Chicago
Chen Chia-Wen, National Bureau of Economic Research, Knittel Christopher R and Hu Wei Min. 2017. Subsidizing fuel efficient cars. Cambridge: NBER.
Harvard
Chen C., National Bureau of Economic Research, Knittel C. R. and Hu W. M. (2017). Subsidizing fuel efficient cars. Cambridge: NBER.
MLA
Chen Chia-Wen, National Bureau of Economic Research, Knittel Christopher R and Hu Wei Min. Subsidizing fuel efficient cars. Cambridge: NBER. 2017.