Cita APA (7th ed.)

Stead, L., Perera, R., & Lancaster, T. (2007). A systematic review of interventions for smokers who contact quitlines.

Cita Chicago (17th ed.)

Stead, L., R. Perera, i T. Lancaster. A Systematic Review of Interventions for Smokers Who Contact Quitlines. 2007.

Cita MLA (9th ed.)

Stead, L., et al. A Systematic Review of Interventions for Smokers Who Contact Quitlines. 2007.