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.
The WSU Libraries do not endorse any particular citation management application. That said, from experience, I've found there to be a little less of a learning curve with Zotero and Mendeley as opposed to EndNote.
Although I use all three applications, I tend to use Zotero the most.