User talk:121.216.123.19

Recent edit to Detonation
Hello, and welcome to Wikipedia. I noticed that you made a change to an article, Detonation, 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! Steve Quinn (talk) 01:32, 12 March 2018 (UTC)

Copying within Wikipedia requires proper attribution
Thank you for your contributions to Wikipedia. It appears that you copied or moved text from Engine knocking into Pre-ignition. While you are welcome to re-use Wikipedia's content, here or elsewhere, Wikipedia's licensing does require that you provide attribution to the original contributor(s). When copying within Wikipedia, this is supplied at minimum in an edit summary at the page into which you've copied content, disclosing the copying and linking to the copied page, e.g.,. It is good practice, especially if copying is extensive, to also place a properly formatted copied template on the talk pages of the source and destination. The attribution has been provided for this situation, but if you have copied material between pages before, even if it was a long time ago, please provide attribution for that duplication. You can read more about the procedure and the reasons at Copying within Wikipedia. Thank you. If you are the sole author of the prose that was moved, attribution is not required. — Diannaa 🍁 (talk) 15:25, 12 March 2018 (UTC)