Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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