Dyfyniad APA

Hulley, S. B. (2013). Designing clinical research (4th ed.). Wolters Kluwer/Lippincott Williams & Wilkins.

Dyfyniad Arddull Chicago

Hulley, Stephen B. Designing Clinical Research. 4th ed. Philadelphia: Wolters Kluwer/Lippincott Williams & Wilkins, 2013.

Dyfyniad MLA

Hulley, Stephen B. Designing Clinical Research. 4th ed. Wolters Kluwer/Lippincott Williams & Wilkins, 2013.

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