Dyfyniad APA

Glasziou, P., & Heneghan, C. (2009). A spotter's guide to study designs.

Dyfyniad Arddull Chicago

Glasziou, P., and C. Heneghan. A Spotter's Guide to Study Designs. 2009.

Dyfyniad MLA

Glasziou, P., and C. Heneghan. A Spotter's Guide to Study Designs. 2009.

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