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.
Chicago Style aipamenaHowick, J., F. Bishop, C. Heneghan, J. Wolstenholme, S. Stevens, R. Hobbs, and G. Lewith. Placebo Use in the United Kingdom: Results from a National Survey of Primary Care Practitioners. Public Library of Science, 2013.
MLA aipamenaHowick, J., et al. Placebo Use in the United Kingdom: Results from a National Survey of Primary Care Practitioners. Public Library of Science, 2013.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.