* {{Cite book| last = Himanen | first = Pekka | coauthors = Linus Torvalds, and Manuel Castells | title = The Hacker Ethic | publisher = Secker & Warburg | year = 2001 | isbn = 0-436-20550-5 }}
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{{Cite book| last = Himanen | first = Pekka | coauthors = Linus Torvalds, and Manuel Castells | title = The Hacker Ethic | publisher = Secker & Warburg | year = 2001 | isbn = 0-436-20550-5 }}