User talk:2600:1700:7E31:8B0:6027:5B66:289B:B57E

Recent edit to Pfizer
Hello, and welcome to Wikipedia. I noticed that you made a change to an article, Pfizer, 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! Materialscientist (talk) 10:17, 1 February 2019 (UTC)