Cita APA

Shafer, P. (2017). Impact of US smoke-free air laws on restaurants and bars by employer size: A panel study. BMJ Open.

Citación estilo Chicago

Shafer, Paul. "Impact of US Smoke-free Air Laws On Restaurants and Bars By Employer Size: A Panel Study." BMJ Open 2017.

Cita MLA

Shafer, Paul. "Impact of US Smoke-free Air Laws On Restaurants and Bars By Employer Size: A Panel Study." BMJ Open 2017.