Fuld, L. M. (2006). The Secrete Language of Competitive Intelligence. Crown Business.
Chicago Style aipamenaFuld, Leonard M. The Secrete Language of Competitive Intelligence. Crown Business, 2006.
MLA aipamenaFuld, Leonard M. The Secrete Language of Competitive Intelligence. Crown Business, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.