Cita APA (7a ed.)

Kirchner, D., & O'Lenick, T. A. (1987). Heart valve replacement surgery. Distribution Medtronic.

Cita Chicago Style (17a ed.)

Kirchner, Donald, y Thomas A. O'Lenick. Heart Valve Replacement Surgery. Minneapolis: Distribution Medtronic, 1987.

Cita MLA (9a ed.)

Kirchner, Donald, y Thomas A. O'Lenick. Heart Valve Replacement Surgery. Distribution Medtronic, 1987.