Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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