Williams, P. D. (1977). Filipino children's concepts of body organs and illness. College of Nursing, University of the Philippines.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Williams, Phoebe Dauz. Filipino Children's Concepts of Body Organs and Illness. Quezon City: College of Nursing, University of the Philippines, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Williams, Phoebe Dauz. Filipino Children's Concepts of Body Organs and Illness. College of Nursing, University of the Philippines, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.