Bibliography (6):

1. Implementing Recommendations From Web Accessibility Guidelines: Would They Also Provide Benefits to Nondisabled Users

2. The Effect of Ad Blocking on User Engagement with the Web

3. When graphics improve liking but not learning from online lessons

4. A Large-Scale Characterization of How Readers Browse Wikipedia

5. Wikipedia Bibliography:

   1. https://en.wikipedia.org/wiki/Web_accessibility

      https://en.wikipedia.org/wiki/Web_accessibility

   2. https://en.wikipedia.org/wiki/Web_Content_Accessibility_Guidelines#WCAG_2.0

      https://en.wikipedia.org/wiki/Web_Content_Accessibility_Guidelines#WCAG_2.0