User talk:Chemical engineers

May 2021
Hello, I'm Chompy Ace. I noticed that you added or changed content in an article, Wikipedia logo, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at the tutorial on citing sources. If you think I made a mistake, you can leave me a message on my talk page. Thank you. Chompy Ace 11:25, 22 May 2021 (UTC)

sorry
--Chemical engineers (talk) 11:33, 22 May 2021 (UTC) Sorry I did not know but how do I add the source? Chemical engineers (talk) 11:33, 22 May 2021 (UTC)--