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Hello, I'm Materialscientist. I noticed that you made a change to an article, 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) 09:32, 19 February 2014 (UTC)
Please refrain from making unconstructive edits to Wikipedia, as you did at Alex Oxlade-Chamberlain. Your edits appear to constitute vandalism and have been reverted or removed. If you would like to experiment, please use the sandbox. Administrators have the ability to block users from editing if they repeatedly engage in vandalism. Thank you. Mattythewhite (talk) 13:49, 24 January 2015 (UTC)
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Please do not add or change content, as you did at Masss , without citing a reliable source. Please review the guidelines at Wikipedia:Citing sources and take this opportunity to add references to the article. Thank you. Materialscientist (talk) 04:53, 3 June 2015 (UTC)
Hello, I'm Walter Görlitz. I wanted to let you know that one or more of your recent contributions to Systems development life cycle has been undone because it did not appear constructive. If you would like to experiment, please use the sandbox. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. Walter Görlitz (talk) 14:06, 5 May 2016 (UTC)
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