Gaya APA

Otto, C, M. et al (2020). Echocardiography review guide : companion to textbook of clinical echocardiography (Ed. 4). Philadelphia: Elsevier.

Gaya MLA

Otto, Catherine, M.. et al. "Echocardiography review guide : companion to textbook of clinical echocardiography". Ed. 4 Philadelphia: Elsevier, 2020. Buku.