2009年3月9日、4Aがガイドブックを発行。デジタルは伝統的メディアよりもコストがかかることなどを解説。
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Understanding the Economics of Digital Compared to Traditional Advertising and Media Services
http://www2.aaaa.org/news/bulletins/Pages/060909_burtonmgtbk.aspx
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Understanding the Economics of Digital Compared to Traditional Advertising and Media Services
http://www2.aaaa.org/news/bulletins/Pages/060909_burtonmgtbk.aspx
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