APA ציטוט

Piper, M. E., Smith, S. S., Schlam, T. R., Fiore, M. C., Jorenby, D. E., Fraser, D., & Baker, T. B. (2009). A randomized placebo-controlled clinical trial of five smoking cessation pharmacotherapies.

Citação norma Chicago

Piper, Megan E., Stevens S. Smith, Tanya R. Schlam, Michael C. Fiore, Douglas E. Jorenby, David Fraser, and Timothy B. Baker. A Randomized Placebo-controlled Clinical Trial of Five Smoking Cessation Pharmacotherapies. 2009.

ציטוט MLA

Piper, Megan E., et al. A Randomized Placebo-controlled Clinical Trial of Five Smoking Cessation Pharmacotherapies. 2009.