User talk:Richard Gale
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November 2017
[edit] Hello, I'm Walter Görlitz. I noticed that you made a change to an article, Systems development life cycle, 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! 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. Walter Görlitz (talk) 07:15, 16 November 2017 (UTC)
![](http://upload.wikimedia.org/wikipedia/en/thumb/c/cf/Copyright-problem.svg/30px-Copyright-problem.svg.png)
The material was copied directly from another website, and thus was a copyright violation. Please don't add copyright material to this wiki. — Diannaa 🍁 (talk) 13:49, 17 November 2017 (UTC)