Callon, J. D. (1996). Competitive advantage through information technology. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Callon, Jack D. Competitive Advantage Through Information Technology. New York: McGraw-Hill, 1996.
Lua MLA (8ú heag.)Callon, Jack D. Competitive Advantage Through Information Technology. McGraw-Hill, 1996.
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