User talk:AbuAhmed1

Please do not add or change content without citing a reliable source. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Thank you. Materialscientist (talk) 10:47, 31 December 2016 (UTC)

Wikipedia is not a "reliable source". See WP:CIRCULAR Please use a wp:reliable source Jim1138 (talk) 10:12, 5 January 2017 (UTC)