Surgical pericardial heart valves: 50 Years of evolution.

MLA

Attia, Rizwan Q., and Shahzad G. Raja. “Surgical Pericardial Heart Valves: 50 Years of Evolution.” International Journal of Surgery (London, England), vol. 94, Oct. 2021, p. 106121. EBSCOhost, https://doi.org/10.1016/j.ijsu.2021.106121.

APA

Attia, R. Q., & Raja, S. G. (2021). Surgical pericardial heart valves: 50 Years of evolution. International Journal of Surgery (London, England), 94, 106121. https://doi.org/10.1016/j.ijsu.2021.106121

Chicago

Attia, Rizwan Q, and Shahzad G Raja. 2021. “Surgical Pericardial Heart Valves: 50 Years of Evolution.” International Journal of Surgery (London, England) 94 (October): 106121. doi:10.1016/j.ijsu.2021.106121.