APA-referens (7:e uppl.)

Graybiel, A. (1952). Electrocardiography in practice. Saunders.

Chicago-referens (17:e uppl.)

Graybiel, Ashton. Electrocardiography in Practice. Philadelphia: Saunders, 1952.

MLA-referens (9:e uppl.)

Graybiel, Ashton. Electrocardiography in Practice. Saunders, 1952.