Crossley, Rob (May 12, 2011). „"Valve on Source and studio culture".”. Архивирано из оригинала 06. 03. 2016. г. Приступљено 14. 8. 2011.CS1 одржавање: Формат датума (веза) Develop Magazine.. We have as many people working on our tools as we have working on a single project. So, about twenty to thirty core people.
„Steamcast #47”. Steamcast. 9. 2. 2011. Архивирано из оригинала 18. 8. 2011. г. Приступљено 14. 8. 2011. „Oh yeah, we're spending a tremendous amount of time on tools right now. So, our current tools are... very painful, so we probably are spending more time on tools development now than anything else and when we’re ready to ship those I think everybody's life will get a lot better. Just way too hard to develop content right now, both for ourselves and for third parties so we’re going to make enormously easier and simplify that process a lot.”
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Johnson, Erik (1. 9. 2005). „Talk:Erik Johnson”. Valve Developer Community. Архивирано из оригинала 20. 03. 2007. г. Приступљено 15. 8. 2007.
Crossley, Rob (May 12, 2011). „"Valve on Source and studio culture".”. Архивирано из оригинала 06. 03. 2016. г. Приступљено 14. 8. 2011.CS1 одржавање: Формат датума (веза) Develop Magazine.. We have as many people working on our tools as we have working on a single project. So, about twenty to thirty core people.
„Steamcast #47”. Steamcast. 9. 2. 2011. Архивирано из оригинала 18. 8. 2011. г. Приступљено 14. 8. 2011. „Oh yeah, we're spending a tremendous amount of time on tools right now. So, our current tools are... very painful, so we probably are spending more time on tools development now than anything else and when we’re ready to ship those I think everybody's life will get a lot better. Just way too hard to develop content right now, both for ourselves and for third parties so we’re going to make enormously easier and simplify that process a lot.”
