the difference between a bibliography and an annotated bibliography is that the annotated bibliography has a summary of the article after the bibliography. And since it has one all the bibliographies will become annotated since they will all get a summary of what the articles are about. and a bibliography is just the references basically. They are both useful, however, the annotated bibliography is more used as a reminder to know what the article in question is about. The original bibliography is useful because in case you don’t remember what the article is about, you will be able to use the link in the bibliography to go straight to the article and be able to read and find the quote you were going to use in your essay or powerpoint.