Cita APA (7a ed.)

Song, F., Holland, R., Barton, G., Bachmann, M., Blyth, A., Maskrey, V., . . . Brandon, T. (2012). Self-help materials for the prevention of smoking relapse: Study protocol for a randomized controlled trial. BioMed Central.

Cita Chicago Style (17a ed.)

Song, F., et al. Self-help Materials for the Prevention of Smoking Relapse: Study Protocol for a Randomized Controlled Trial. BioMed Central, 2012.

Cita MLA (9a ed.)

Song, F., et al. Self-help Materials for the Prevention of Smoking Relapse: Study Protocol for a Randomized Controlled Trial. BioMed Central, 2012.