توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Kirkham, J., Altman, D., & Williamson, P. (2010). Bias due to changes in specified outcomes during the systematic review process. Public Library of Science.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Kirkham, J., D. Altman, و P. Williamson. Bias Due to Changes in Specified Outcomes During the Systematic Review Process. Public Library of Science, 2010.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Kirkham, J., et al. Bias Due to Changes in Specified Outcomes During the Systematic Review Process. Public Library of Science, 2010.