APA
Hafstead M. A. C., National Bureau of Economic Research, Williams R. C. & Chen Y. (2018). Environmental policy, full-employment models and employment. Cambridge: NBER.
Chicago
Hafstead Marc A C, National Bureau of Economic Research, Williams Roberton C and Chen Yunguang. 2018. Environmental policy, full-employment models and employment. Cambridge: NBER.
Harvard
Hafstead M. A. C., National Bureau of Economic Research, Williams R. C. and Chen Y. (2018). Environmental policy, full-employment models and employment. Cambridge: NBER.
MLA
Hafstead Marc A C, National Bureau of Economic Research, Williams Roberton C and Chen Yunguang. Environmental policy, full-employment models and employment. Cambridge: NBER. 2018.