Reuben, D. B., & Beck, J. C. (1994). Training physicians to care for older Americans: Progress, obstacles, and future directions. National Academy Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Reuben, David B., و John C. Beck. Training Physicians to Care for Older Americans: Progress, Obstacles, and Future Directions. Washington, DC: National Academy Press, 1994.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Reuben, David B., و John C. Beck. Training Physicians to Care for Older Americans: Progress, Obstacles, and Future Directions. National Academy Press, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.