If you cannot find the item you need via MultiSearch, you can manually create a citation.
Step 1 - Click on the + button on the right-hand side of the page;
Step 2 - Click on the Create tab and fill out the relevant details in the form. The Source field is where you can add the URL for online material;
If you are uploading a file that you own the copyright and distribution rights to, you can assign a Creative Commons License by selecting a license type from the drop-down list (see http://creativecommons.org.au/content/licensing-flowchart.pdf for information on CC licenses).
Step 3 - Click on SAVE to complete the process.