APA
Wernerfelt N., National Bureau of Economic Research, Slusky D. & Zeckhauser R. (2014). Second trimester sunlight and asthma. Cambridge: NBER.
Chicago
Wernerfelt Nils, National Bureau of Economic Research, Slusky David and Zeckhauser Richard. 2014. Second trimester sunlight and asthma. Cambridge: NBER.
Harvard
Wernerfelt N., National Bureau of Economic Research, Slusky D. and Zeckhauser R. (2014). Second trimester sunlight and asthma. Cambridge: NBER.
MLA
Wernerfelt Nils, National Bureau of Economic Research, Slusky David and Zeckhauser Richard. Second trimester sunlight and asthma. Cambridge: NBER. 2014.