Fletcher, R. H., Fletcher, S. W., & Fletcher, G. S. (2014). Clinical epidemiology: The essentials (5th ed.). Wolters Kluwer/Lippincott Williams & Wilkins Health.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFletcher, Robert H., Suzanne W. Fletcher, और Grant S. Fletcher. Clinical Epidemiology: The Essentials. 5th ed. Philadelphia: Wolters Kluwer/Lippincott Williams & Wilkins Health, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFletcher, Robert H., et al. Clinical Epidemiology: The Essentials. 5th ed. Wolters Kluwer/Lippincott Williams & Wilkins Health, 2014.
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