WELLS, Amy Tracy (2008), «A Portrait of Early Internet Adopters: Why People First Went Online --and Why They Stayed», Pew Internet & American Life Project 20/02/08

WELLS, Amy Tracy (2008), «A Portrait of Early Internet Adopters: Why People First Went Online --and Why They Stayed», Pew Internet & American Life Project 20/02/08 [http://pewresearch.org/pubs/739/early-internet-adopters]