BioMed Central Ltd. (2003). Cardiovascular ultrasound. BioMed Central.
Cita Chicago Style (17a ed.)BioMed Central Ltd. Cardiovascular Ultrasound. London, UK: BioMed Central, 2003.
Cita MLA (8a ed.)BioMed Central Ltd. Cardiovascular Ultrasound. BioMed Central, 2003.
Precaución: Estas citas no son 100% exactas.