Rypins, H. (1939). Medical state board examinations: Topical summaries and answers; an organized review of actual questions given in medical licensing examinations throughout the United States (4th ed.). J. B. Lippincott company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Rypins, Harold. Medical State Board Examinations: Topical Summaries and Answers; an Organized Review of Actual Questions Given in Medical Licensing Examinations Throughout the United States. 4th ed. Philadelphia [etc.]: J. B. Lippincott company, 1939.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Rypins, Harold. Medical State Board Examinations: Topical Summaries and Answers; an Organized Review of Actual Questions Given in Medical Licensing Examinations Throughout the United States. 4th ed. J. B. Lippincott company, 1939.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.