Levinson, P. (1997). The soft edge: A natural history and future of the information revolution (1. publ.). Routledge.
Chicago-viite (17. p.)Levinson, Paul. The Soft Edge: A Natural History and Future of the Information Revolution. 1. publ. London ; New York: Routledge, 1997.
MLA-viite (8. p.)Levinson, Paul. The Soft Edge: A Natural History and Future of the Information Revolution. 1. publ. Routledge, 1997.
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