Cita APA (7a ed.)

Stead, L., Hartmann-Boyce, J., Perera, R., & Lancaster, T. (2013). Telephone counselling for smoking cessation.

Cita Chicago Style (17a ed.)

Stead, L., J. Hartmann-Boyce, R. Perera, y T. Lancaster. Telephone Counselling for Smoking Cessation. 2013.

Cita MLA (9a ed.)

Stead, L., et al. Telephone Counselling for Smoking Cessation. 2013.