Cohen, J. A. (2005). Intangible assets: Valuation and economic benefit. Wiley.
Lua i Stíl Chicago (17ú heag.)Cohen, Jeffrey A. Intangible Assets: Valuation and Economic Benefit. Hoboken, N.J.: Wiley, 2005.
Lua MLA (9ú heag.)Cohen, Jeffrey A. Intangible Assets: Valuation and Economic Benefit. Wiley, 2005.
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