Gaya APA

Herr, C., Roscoe, A. (2015). Transoesophageal echocardiography in cardiac anaesthesia . : Elsevier Ltd.

Gaya MLA

Herr, Christine., Roscoe, Andrew. "Transoesophageal echocardiography in cardiac anaesthesia". : Elsevier Ltd, 2015. e-journal.