User talk:TI-84 calculator

Recent edit to Doom (1993 video game)
Hello, and welcome to Wikipedia. I noticed that you made a change to an article, Doom (1993 video game), but you didn't provide a reliable source. It's been removed for now, but if you'd like to include a citation and re-add it, please do so! If you need guidance on referencing, please see the referencing for beginners tutorial, or if you think I made a mistake, you can leave me a message on my talk page. Thank you! M.Bitton (talk) 23:58, 28 February 2020 (UTC)