In general, a citation follows the form of, Who said it? What was it called? Where was it published? When was it published? How did you access it?
Who wrote/created this?
What is it called?
Where/When was it published?
When did you access it?
Remember: The poster is not always the creator
Some sort of footnote or citation is better than nothing.
Dunn, Mark. Ibid: A Life in Footnotes. San Francisco, CA: MacAdam/Cage Pub, 2004. Print.
Coyne, Jack. “When Beyonce Says ‘Okay Ladies Now Let's Get in Formation’ Is She Lowkey Saying 'Information'?You Know How Ladies Be Getting That Info...” Twitter, Twitter, 11 June 2016, twitter.com/jackycoyne/status/741453189749280768?lang=en. Accessed 21 Aug. 2019.