APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

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