APA   Click to copy
Grant, W. B., & Lordan, R. (2021). Vitamin D for COVID-19 on Trial: An Update on Prevention and Therapeutic Application. Endocrine Practice.

Chicago/Turabian   Click to copy
Grant, William B, and Ronan Lordan. “Vitamin D for COVID-19 on Trial: An Update on Prevention and Therapeutic Application.” Endocrine Practice (September 10, 2021).

MLA   Click to copy
Grant, William B., and Ronan Lordan. “Vitamin D for COVID-19 on Trial: An Update on Prevention and Therapeutic Application.” Endocrine Practice, Sept. 2021.

@article{william2021a,
  title = {Vitamin D for COVID-19 on Trial: An Update on Prevention and Therapeutic Application.},
  year = {2021},
  month = sep,
  day = {10},
  journal = {Endocrine Practice},
  author = {Grant, William B and Lordan, Ronan},
  month_numeric = {9}
}