Williams, G. A., & Labovitz, A. J. (1985). Doppler hemodynamic evaluation of prosthetic (Starr-Edwards and Björk-Shiley) and Bioprosthetic (Hancock and Carpentier-Edwards) cardiac valves. The American journal of cardiology, 56(4), 325-332. https://doi.org/10.1016/0002-9149(85)90858-6
Chicago Style (17th ed.) CitationWilliams, George A., and Arthur J. Labovitz. "Doppler Hemodynamic Evaluation of Prosthetic (Starr-Edwards and Björk-Shiley) and Bioprosthetic (Hancock and Carpentier-Edwards) Cardiac Valves." The American Journal of Cardiology 56, no. 4 (1985): 325-332. https://doi.org/10.1016/0002-9149(85)90858-6.
MLA (9th ed.) CitationWilliams, George A., and Arthur J. Labovitz. "Doppler Hemodynamic Evaluation of Prosthetic (Starr-Edwards and Björk-Shiley) and Bioprosthetic (Hancock and Carpentier-Edwards) Cardiac Valves." The American Journal of Cardiology, vol. 56, no. 4, 1985, pp. 325-332, https://doi.org/10.1016/0002-9149(85)90858-6.