APA Style

Wagner, G, S., Marriott, H, J, L. (1994). Marriott's practical electrocardiography (9th). Baltimore: Lippincott Williams & Wilkins.

MLA Style

Wagner, Galen, S.., Marriott, Henry, J., L.. "Marriott's practical electrocardiography". 9th Baltimore: Lippincott Williams & Wilkins, 1994. Text.