APA
Clay K., National Bureau of Economic Research, Lewis J. & Severnini E. (2015). Pollution, infectious disease and mortality. Cambridge: NBER.
Chicago
Clay Karen, National Bureau of Economic Research, Lewis Joshua and Severnini Edson. 2015. Pollution, infectious disease and mortality. Cambridge: NBER.
Harvard
Clay K., National Bureau of Economic Research, Lewis J. and Severnini E. (2015). Pollution, infectious disease and mortality. Cambridge: NBER.
MLA
Clay Karen, National Bureau of Economic Research, Lewis Joshua and Severnini Edson. Pollution, infectious disease and mortality. Cambridge: NBER. 2015.