APA (7th ed.) Citation

Haug Severin, Meyer Christian, Dymalski Andrea, Lippke Sonia, & John Ulrich. (2012). Efficacy of a text messaging (SMS) based smoking cessation intervention for adolescents and young adults: Study protocol of a cluster randomised controlled trial. BMC.

Chicago Style (17th ed.) Citation

Haug Severin, Meyer Christian, Dymalski Andrea, Lippke Sonia, and John Ulrich. Efficacy of a Text Messaging (SMS) Based Smoking Cessation Intervention for Adolescents and Young Adults: Study Protocol of a Cluster Randomised Controlled Trial. BMC, 2012.

MLA (9th ed.) Citation

Haug Severin, et al. Efficacy of a Text Messaging (SMS) Based Smoking Cessation Intervention for Adolescents and Young Adults: Study Protocol of a Cluster Randomised Controlled Trial. BMC, 2012.

Warning: These citations may not always be 100% accurate.