The Chicago Manual of Style, 17th ed.
Turabian: A Manual for Writers of Research Papers(CMS 14.207)
1. Firstname M. Lastname, "This Is the Title of the Web Page," This is the Owner or Sponsor of the Site, last modified Month Day, Year, http://URL.
1. Joanne M. Zellers, "African Peoples' Encounters with Others," Africana Collections: An Illustrated Guide, last modified November 15, 2010, http://www.loc.gov/rr/amed/guide/afr-encounters.html.
2. Zellers, "African Peoples' Encounters."
Zellers, Joanne M. "African Peoples' Encounters With Others." Africana Collections: An Illustrated Guide. Last modified November 15, 2010. http://www.loc.gov/rr/amed/guide/afr-encounters.html.
Include a publication date or date of revision or modification (see CMS 14.8); if no such date can be determined, include an access date (see CMS 14.7).
(CMS 14.208)
Citations of blog entries are generally relegated to the notes; a frequently cited blog, however, may be included in the bibliography.
1. Chris Buckley, "‘White-Haired Girl,’ Opera Created Under Mao, Returns to Stage," Sinosphere (blog), New York Times, November 10, 2015, http://sinosphere.blogs.nytimes.com/2015/11/10/white-haired-girl-opera-created-under-mao-returns-to-stage/.
Firstname Lastname (Screen Name), "Text of post, up to 160 characters," Social media service and format if not text, Date posted, URL.
1. Pope Francis (@Pontifex), "We must never forget that the natural environment is a collective good, the patrimony of all humanity and the responsibility of everyone," Twitter, June 5, 2017, 7:30 a.m., https://twitter.com/Pontifex/status/871690564483375104.