APA (7th ed.) Citation

Colman, G., Grossman, M., & Joyce, T. J. (2002). The effect of cigarette excise taxes on smoking before, during and after pregnancy. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Colman, Greg, Michael Grossman, and Theodore J. Joyce. The Effect of Cigarette Excise Taxes on Smoking Before, During and After Pregnancy. Cambridge, Mass: National Bureau of Economic Research, 2002.

MLA (9th ed.) Citation

Colman, Greg, et al. The Effect of Cigarette Excise Taxes on Smoking Before, During and After Pregnancy. National Bureau of Economic Research, 2002.