Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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