You learned in school not to write all your papers by just looking on the internet. It was a sign of lazy work and arose suspicion of cheating. And the information that you found on Wikipedia wasn’t to be trusted. Who knows who wrote that?
Times have changed since I was in school. Now the internet is a vital source of information and authorship can be verified on reliable websites. And it takes a long time for editors to publish books, and a long time to get to the library to check them out.