APA (7 वां संस्करण) प्रशस्ति पत्र

Fletcher, R. H., & Fletcher, S. W. (2005). Clinical epidemiology: The essentials (4th ed.). Lippincott Williams & Wilkins.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Fletcher, Robert H., और Suzanne W. Fletcher. Clinical Epidemiology: The Essentials. 4th ed. Philadelphia: Lippincott Williams & Wilkins, 2005.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Fletcher, Robert H., और Suzanne W. Fletcher. Clinical Epidemiology: The Essentials. 4th ed. Lippincott Williams & Wilkins, 2005.