APA aipamena

Knottnerus, J. A., & Tugwell, P. (2020). Methodological challenges in studying the COVID-19 pandemic crisis. J Clin Epidemiol.

Chicago Style aipamena

Knottnerus, J. André, and Peter Tugwell. "Methodological Challenges in Studying the COVID-19 Pandemic Crisis." J Clin Epidemiol 2020.

MLA aipamena

Knottnerus, J. André, and Peter Tugwell. "Methodological Challenges in Studying the COVID-19 Pandemic Crisis." J Clin Epidemiol 2020.

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