Cita APA (7th ed.)

Hackshaw, A. K. (2015). A concise guide to observational studies in healthcare. John Wiley & Sons Inc..

Cita Chicago (17th ed.)

Hackshaw, Allan K. A Concise Guide to Observational Studies in Healthcare. Chichester, West Sussex, United Kingdom: John Wiley & Sons Inc., 2015.

Cita MLA (9th ed.)

Hackshaw, Allan K. A Concise Guide to Observational Studies in Healthcare. John Wiley & Sons Inc., 2015.