APA
Kahn M. E., Zheng S., . (2016). Blue skies over Beijing: Economic growth and the environment. Princeton: Princeton Uni Pr.
Chicago
Kahn Matthew E, Zheng Siqi, . 2016. Blue skies over Beijing: Economic growth and the environment. Princeton: Princeton Uni Pr.
Harvard
Kahn M. E., Zheng S., . (2016). Blue skies over Beijing: Economic growth and the environment. Princeton: Princeton Uni Pr.
MLA
Kahn Matthew E, Zheng Siqi, . Blue skies over Beijing: Economic growth and the environment. Princeton: Princeton Uni Pr. 2016.