توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Howick, J., Bishop, F., Heneghan, C., Wolstenholme, J., Stevens, S., Hobbs, R., & Lewith, G. (2013). Placebo use in the United kingdom: Results from a national survey of primary care practitioners. Public Library of Science.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Howick, J., F. Bishop, C. Heneghan, J. Wolstenholme, S. Stevens, R. Hobbs, و G. Lewith. Placebo Use in the United Kingdom: Results from a National Survey of Primary Care Practitioners. Public Library of Science, 2013.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Howick, J., et al. Placebo Use in the United Kingdom: Results from a National Survey of Primary Care Practitioners. Public Library of Science, 2013.