APA (7th ed.) Citation

DA, F., & PC, H. (2014). Commentary on Berlin et al. Clinical trials (London, England), 11(1), 13. https://doi.org/10.1177/1740774513514794

Chicago Style (17th ed.) Citation

DA, Fergusson, and Hebert PC. "Commentary on Berlin Et Al." Clinical Trials (London, England) 11, no. 1 (2014): 13. https://doi.org/10.1177/1740774513514794.

MLA (9th ed.) Citation

DA, Fergusson, and Hebert PC. "Commentary on Berlin Et Al." Clinical Trials (London, England), vol. 11, no. 1, 2014, p. 13, https://doi.org/10.1177/1740774513514794.