Ward, R. P., Lee, L., Ward, T. J., & Lang, R. M. (2020). Utilization and Appropriateness of Transthoracic Echocardiography in Response to the COVID-19 Pandemic. J Am Soc Echocardiogr.
استشهاد بنمط شيكاغوWard, R. Parker, Linda Lee, Timothy J. Ward, و Roberto M. Lang. "Utilization and Appropriateness of Transthoracic Echocardiography in Response to the COVID-19 Pandemic." J Am Soc Echocardiogr 2020.
MLA استشهادWard, R. Parker, Linda Lee, Timothy J. Ward, و Roberto M. Lang. "Utilization and Appropriateness of Transthoracic Echocardiography in Response to the COVID-19 Pandemic." J Am Soc Echocardiogr 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.