Finding & Selecting Sources
You can select sources from the Search Bar by clicking the Select Sources link on the right, and then clicking the + sign to the right of Select Options. From there, you have two options. First, you can type the name of your source into the Select Sources search field and select it from the dropdown list.
Alternatively, you can drill down through the list of sources using the arrows to the left of the source titles, and click the box to the left of the source you would like to search.