Powell, J. W. (1903). Proceedings of the meeting commemorative of his distinguished services: Held in Columbian University under the Auspices of the Washington Academy of Sciences, February 16, 1903. Academy of Sciences.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Powell, John Wesley. Proceedings of the Meeting Commemorative of His Distinguished Services: Held in Columbian University Under the Auspices of the Washington Academy of Sciences, February 16, 1903. Washington: Academy of Sciences, 1903.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Powell, John Wesley. Proceedings of the Meeting Commemorative of His Distinguished Services: Held in Columbian University Under the Auspices of the Washington Academy of Sciences, February 16, 1903. Academy of Sciences, 1903.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.