Cita APA

Stead, L., Buitrago, D., Preciado, N., Sanchez, G., Hartmann-Boyce, J., & Lancaster, T. (2013). Physician advice for smoking cessation.

Citación estilo Chicago

Stead, L., D. Buitrago, N. Preciado, G. Sanchez, J. Hartmann-Boyce, and T. Lancaster. Physician Advice for Smoking Cessation. 2013.

Cita MLA

Stead, L., et al. Physician Advice for Smoking Cessation. 2013.