User talk:2409:4043:220C:DB7:A2B0:20D3:19C:BD5C

Recent edit to Price elasticity of demand
Hello, and welcome to Wikipedia. I noticed that you made a change to an article, Price elasticity of demand, 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!  — Ruyter (talk • edits)  13:42, 31 December 2018 (UTC)