The Zotero Style Repository currently offers, and regularly updates, annotated styles for two bibliographic formats:
These styles use the information stored in Zotero's Extra field to display the annotation.
Use the following right-click technique to create a file with the annotated bibliography:
NOTE: The following two Zotero bibliography creation techniques do NOT generate properly formatted annotations:
I created a few additional Zotero annotated bibliography styles that use the information stored in Zotero's Extra field to display the annotation. You can use the styles below to place your own annotation into the Extra field, and then generate an annotated bibliography using your own words. [Note: As to how much text can be stored in the Extra field, there is no limit on the client side. For syncing, text is limited to 64KB.]