APA (7th ed.) Citation

Ennker, J., Albert, A., & Florath, I. (2010). Medtronic stentless Freestyle® porcine aortic valve replacement. Steinkopff.

Chicago Style (17th ed.) Citation

Ennker, J., A. Albert, and Ines Florath. Medtronic Stentless Freestyle® Porcine Aortic Valve Replacement. Steinkopff, 2010.

MLA (9th ed.) Citation

Ennker, J., et al. Medtronic Stentless Freestyle® Porcine Aortic Valve Replacement. Steinkopff, 2010.