↑Chiang, Oliver (February 9, 2011). "The Master of Online Mayhem". Forbes. خونديځ د اصلي څخه March 7, 2017. لاسرسينېټه March 6, 2017. منځګړی |CitationClass= له پامه غورځول شوی (لارښود)
↑"Privacy Policy Agreement". Valve. خونديځ د اصلي څخه December 31, 2016. لاسرسينېټه January 1, 2017. Payment processing related to Content and Services and/or physical goods purchased on Steam is performed by either Valve Corporation directly or by Valve’s fully owned subsidiary Valve GmbH on behalf of Valve Corporation depending on the type of payment method used.منځګړی |CitationClass= له پامه غورځول شوی (لارښود)