Websites are often missing information like author or date published. If you can't find it listed on the website, leave it out of the citation but try and list as much of the following as possible. Remember to delete http:// from the beginning of the URL, it is not needed.
Editor, author, or compiler name (if available). "Name of Page." Name of Site. Version number, Name of institution/organization affiliated with the site (sponsor or publisher), date of resource creation (if available), URL, DOI or permalink. Date of access (if applicable).
Scallan, Marilyn. "Tattoos: Telling Stories in the Flesh." Smithsonian Insider. Smithsonian, 25 Aug. 2015, insider.si.edu/2015/08/tattoos-telling-stories-in-the-flesh-qa-with-lars-krutak/. Accessed 3 Apr. 2017.
If the name of the website and the publisher are exactly the same, only list the publisher.
"An Overview of Sinusitis." WebMD, www.webmd.com/allergies/sinusitis-and-sinus-infection. Accessed 3 Apr. 2017.