Fuld, L. M. (2006). The Secrete Language of Competitive Intelligence. Crown Business.
Chicago-čujuhus (17. p.)Fuld, Leonard M. The Secrete Language of Competitive Intelligence. Crown Business, 2006.
MLA-čujuhus (9. p.)Fuld, Leonard M. The Secrete Language of Competitive Intelligence. Crown Business, 2006.
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