Dyfyniad APA

Fletcher, R. H., Fletcher, S. W., & Fletcher, G. S. (2014). Clinical epidemiology: The essentials (5th ed.). Wolters Kluwer/Lippincott Williams & Wilkins Health.

Dyfyniad Arddull Chicago

Fletcher, Robert H., Suzanne W. Fletcher, and Grant S. Fletcher. Clinical Epidemiology: The Essentials. 5th ed. Philadelphia: Wolters Kluwer/Lippincott Williams & Wilkins Health, 2014.

Dyfyniad MLA

Fletcher, Robert H., et al. Clinical Epidemiology: The Essentials. 5th ed. Wolters Kluwer/Lippincott Williams & Wilkins Health, 2014.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.