Cita APA (7a ed.)

Stead, L., Lancaster, T., & Silagy, C. (2001). Updating a systematic review - What difference did it make? Case study of nicotine replacement therapy. BioMed Central.

Cita Chicago Style (17a ed.)

Stead, L., T. Lancaster, y C. Silagy. Updating a Systematic Review - What Difference Did It Make? Case Study of Nicotine Replacement Therapy. BioMed Central, 2001.

Cita MLA (9a ed.)

Stead, L., et al. Updating a Systematic Review - What Difference Did It Make? Case Study of Nicotine Replacement Therapy. BioMed Central, 2001.