| Characteristic | Trade | Prof | College | K-12 | News/Mag | Corporate |
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| - | - | - | - | - | - | - |
| - | - | - | - | - | - | - |
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Download
Source
Release date
September 2012
Region
United States
Survey time period
April 2012
Supplementary notes
* Enhanced e-book are e-books with links to related content or rich media such as audio/video.
The number of respondents was not disclosed.
The source does not provide information regarding the missing percentage points missing to or exceeding 100 percent.
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