Gaya APA

Leeson, P. et al (2020). Echocardiograph : Oxford Specialist Handbooks in Cardiology (3rd ed). United Kingdom: Oxford University Press.

Gaya MLA

Leeson, Paul. et al. "Echocardiograph : Oxford Specialist Handbooks in Cardiology". 3rd ed United Kingdom: Oxford University Press, 2020. Text.