"Citations of content shared through social media can usually be limited to the text. A note may be added if a more formal citation is needed. In rare cases, a bibliography entry may also be appropriate. In place of a title, quote up to the first 160 characters of the post." (The Chicago Manual of Style Online, http://www.chicagomanualofstyle.org/tools_citationguide/citation-guide-1.html)
18. Roxane Gay (@rgay), "The bags under my eyes are quite roomy," Twitter, June 17, 2018, 3:59 p.m., https://twitter.com/rgay/status/1008484262763483136.
19. Junot Diaz, "Always surprises my students when I tell them that the 'real' medieval was more diverse than the fake ones most of us consume," Facebook, February 24, 2016, https://www.facebook.com/junotdiaz.writer/posts/972495572815454.
20. Pete Souza (@petesouza), "Back when our President was respected around the world and not unhinged by the rule of law," Instagram photo, May 20, 2018, https://www.instagram.com/p/BjAU5pzl_8_/.