Gaya APA

Nihoyannopoulos, P., Kisslo, J. (2018). Echocardiography (2nd ed. 2018). New york: Springer International Publishing.

Gaya MLA

Nihoyannopoulos, Petros., Kisslo, Joseph. "Echocardiography". 2nd ed. 2018 New york: Springer International Publishing, 2018. Text.