Editor, screen name, author, or compiler name (if available). “Posting Title.” Name of Site, Version number (if available), Name of institution/organization affiliated with the site (sponsor or publisher), URL. Date of access.
Example:
Salmar1515 [Sal Hernandez]. “Re: Best Strategy: Fenced Pastures vs. Max Number of Rooms?” BoardGameGeek, 29 Sept. 2008, boardgamegeek.com/thread/343929/best-strategy-fenced-pastures-vs-max-number-rooms. Accessed 5 Apr. 2018.
@tombrokaw. "SC demonstrated why all the debates are the engines of this campaign." Twitter, 22 Jan. 2018, 3:06 a.m., twitter.com/tombrokaw/status/160996868971704320.
@PurdueWLab. "Spring break is around the corner, and all our locations will be open next week." Twitter, 5 Mar. 2017, 12:58 p.m., twitter.com/PurdueWLab/status/176728308736737282.