APA (7th ed.) Citation

Wallwork, J., & Stepney, R. (1987). Heart disease: What it is and how it's treated. Blackwell.

Chicago Style (17th ed.) Citation

Wallwork, John, and Rob Stepney. Heart Disease: What It Is and How It's Treated. New York: Blackwell, 1987.

MLA (9th ed.) Citation

Wallwork, John, and Rob Stepney. Heart Disease: What It Is and How It's Treated. Blackwell, 1987.