Παραπομπή APA

Ad, N., Luc, J. G., & Nguyen, T. C. (2021). Cardiac surgery in North America and coronavirus disease 2019 (COVID-19): Regional variability in burden and impact. J Thorac Cardiovasc Surg.

Παραπομπή Chicago Style

Ad, Niv, Jessica G.Y Luc, και Tom C. Nguyen. "Cardiac Surgery in North America and Coronavirus Disease 2019 (COVID-19): Regional Variability in Burden and Impact." J Thorac Cardiovasc Surg 2021.

Παραπομπή MLA

Ad, Niv, Jessica G.Y Luc, και Tom C. Nguyen. "Cardiac Surgery in North America and Coronavirus Disease 2019 (COVID-19): Regional Variability in Burden and Impact." J Thorac Cardiovasc Surg 2021.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.