APA   Click to copy
Houser, R. (2021, May 2). Opinion: Progress in the battle against opioid addiction. https://www.washingtonpost.com/opinions/letters-to-the-editor/progress-in-the-battle-against-opioid-addiction/2021/04/30/f34ec0c8-a8fd-11eb-a8a7-5f45ddcdf364_story.html.%20: The Washington Post.

Chicago/Turabian   Click to copy
Houser, Ryan. “Opinion: Progress in the Battle against Opioid Addiction.” https://www.washingtonpost.com/opinions/letters-to-the-editor/progress-in-the-battle-against-opioid-addiction/2021/04/30/f34ec0c8-a8fd-11eb-a8a7-5f45ddcdf364_story.html.%20: The Washington Post, May 2, 2021.

MLA   Click to copy
Houser, Ryan. Opinion: Progress in the Battle against Opioid Addiction. The Washington Post, 2 May 2021.

@misc{ryan2021a,
  title = {Opinion: Progress in the battle against opioid addiction},
  year = {2021},
  month = may,
  day = {2},
  address = {https://www.washingtonpost.com/opinions/letters-to-the-editor/progress-in-the-battle-against-opioid-addiction/2021/04/30/f34ec0c8-a8fd-11eb-a8a7-5f45ddcdf364_story.html.%20},
  institution = {The Washington Post},
  author = {Houser, Ryan},
  month_numeric = {5}
}