Graybiel, A. Electrocardiography in practice: Saunders.
Cita Chicago (17th ed.)Graybiel, Ashton. Electrocardiography in Practice: Saunders.
Cita MLA (9th ed.)Graybiel, Ashton. Electrocardiography in Practice: Saunders.
Atenció: Aquestes cites poden no estar 100% correctes.