APA (7th ed.) Citation

Schamroth, L. (1971). An introduction to electrocardiography (4th edition.). Blackwell Scientific Publications.

Chicago Style (17th ed.) Citation

Schamroth, L. An Introduction to Electrocardiography. 4th edition. Oxford: Blackwell Scientific Publications, 1971.

MLA (8th ed.) Citation

Schamroth, L. An Introduction to Electrocardiography. 4th edition. Blackwell Scientific Publications, 1971.

Warning: These citations may not always be 100% accurate.