APA استشهاد

Schamroth, L. (1990). Introduction to electro cardiography (7th ed.). Blackwell Science.

استشهاد بنمط شيكاغو

Schamroth, Leo. Introduction to Electro Cardiography. 7th ed. Australia: Blackwell Science, 1990.

MLA استشهاد

Schamroth, Leo. Introduction to Electro Cardiography. 7th ed. Blackwell Science, 1990.