Gaya APA

Klein, , A, L., Asher, C, R. (2017). Clinical Echocardiography Review (2nd ed). Philadelphia: Wolters Kluwer.

Gaya MLA

Klein, , Allan, L.., Asher, Craig, R.. "Clinical Echocardiography Review". 2nd ed Philadelphia: Wolters Kluwer, 2017. Text.