APA (7th ed.) Citation

Docherty, G., McNeill, A., Gartner, C., & Szatkowski, L. (2014). Did hardening occur among smokers in England from 2000 to 2010? Wiley.

Chicago Style (17th ed.) Citation

Docherty, Graeme, Ann McNeill, Coral Gartner, and Lisa Szatkowski. Did Hardening Occur Among Smokers in England from 2000 to 2010? Wiley, 2014.

MLA (9th ed.) Citation

Docherty, Graeme, et al. Did Hardening Occur Among Smokers in England from 2000 to 2010? Wiley, 2014.