Social Media Post:
First Name Last Name if known or username. "Photo title or description." Instagram, Day Month Year of post, Time of post, URL.
Print Ad from magazine or newspaper:
Name of Company That Owns the Product advertisement. Name of Magazine, Journal or Newspaper Where Advertisement Was Accessed, Date, p. Page number of advertisement.
Ad on YouTube or other media platform:
"Title of Video/Product." YouTube (or name of platform), uploaded by name or username, Date of upload, url.