In most cases, you are probably looking at an article or webpage on an organization's website. If there is no individual author's name listed, consider the organization a "group author". [If the webpage is on a government website, follow this format.]
Name of Organization. (Date published). Title of webpage or document: Subtitle of document. https://someurl
Example
Let's say you want to cite this webpage: https://www.nursingworld.org/practice-policy/nursing-excellence/ethics/
- The organization's name is at the top left: American Nurses Association

- Don't panic if you cannot find a date of publication! If there is no date, use n.d.
- The name of the webpage is at the top.
So, the entry for your References page is
American Nurses Association. (n.d.). Ethics and human rights. https://www.nursingworld.org/practice-policy/nursing-excellence/ethics/
And the in-text citation is
(American Nurses Association, n.d.).