Marriott, H. J. L. (1968). Practical electrocardiography. Williams & Wilkins.
Lua i Stíl Chicago (17ú heag.)Marriott, Henry J. L. Practical Electrocardiography. Baltimore: Williams & Wilkins, 1968.
Lua MLA (9ú heag.)Marriott, Henry J. L. Practical Electrocardiography. Williams & Wilkins, 1968.
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