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Malone, Michael S. (5. 6. 2013). „Silicon Valley's Newest Address? Look East”. Forbes (на језику: енглески). Приступљено 10. 4. 2018. „"which contains Contra Costa County, has already had its Silicon Valley growth boom, fueled in large part by the dot.com bubble of the Nineties."”
innovationjournalism.org
Uskali, T., & Nordfors, D. (23 May 2007). The role of journalism in creating the metaphor of Silicon Valley. Paper presented at the Innovation Journalism 4 Conference, Stanford University, Palo Alto, Calif., „Archived copy”(PDF). Архивирано из оригинала(PDF) 7. 9. 2012. г. Приступљено 8. 8. 2016., retrieved 8 August 2016
mercurynews.com
O'Brien, Chris (19. 4. 2012). „Welcome to the new and expanded Silicon Valley”. The Mercury News (на језику: енглески). Приступљено 10. 4. 2018. „"After years of drawing a sharp circle that included Santa Clara County as well as southern San Mateo and Alameda counties, this newspaper is expanding the geographic boundaries that it considers to be part of Silicon Valley to include the five core Bay Area counties: Santa Clara, San Mateo, San Francisco, Alameda and Contra Costa."”
Uskali, T., & Nordfors, D. (23 May 2007). The role of journalism in creating the metaphor of Silicon Valley. Paper presented at the Innovation Journalism 4 Conference, Stanford University, Palo Alto, Calif., „Archived copy”(PDF). Архивирано из оригинала(PDF) 7. 9. 2012. г. Приступљено 8. 8. 2016., retrieved 8 August 2016