It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Zotero Citation Software
guide to using the free Zotero citation and research management program
Videos include a tour of the software and also how to get citations into Zotero, manually create items, create items from websites, and use Word with Zotero. Also shows other advanced features.