Griggs, William. "How to Beta Test Like the Best". Video Interview. The Startup Slingshot. Archived from the original on 2021-12-21. Retrieved 11 December 2011.
Griggs, William. "How to Beta Test Like the Best". Video Interview. The Startup Slingshot. Archived from the original on 2021-12-21. Retrieved 11 December 2011.