Philadelphia Museum of Art, Helfand, W. H., Boyer, P. E., Wechsler, J., & Rickards, M. (1991). The picture of health: Images of medicine and pharmacy from the William H. Helfand collection. Philadelphia Museum of Art : Distributed by the University of Pennsylvania Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philadelphia Museum of Art, William H. Helfand, Patricia Eckert Boyer, Judith Wechsler, و Maurice Rickards. The Picture of Health: Images of Medicine and Pharmacy from the William H. Helfand Collection. Philadelphia, Pa.: Philadelphia Museum of Art : Distributed by the University of Pennsylvania Press, 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Philadelphia Museum of Art, et al. The Picture of Health: Images of Medicine and Pharmacy from the William H. Helfand Collection. Philadelphia Museum of Art : Distributed by the University of Pennsylvania Press, 1991.