APA ציטוט

Rothwell, P. (2006). Factors that can affect the external validity of randomised controlled trials.

Chicago Style (17th ed.) Citation

Rothwell, P. Factors That Can Affect the External Validity of Randomised Controlled Trials. 2006.

ציטוט MLA

Rothwell, P. Factors That Can Affect the External Validity of Randomised Controlled Trials. 2006.