Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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