This page gives you some additional information about maintaining good records of the research materials you are using and making responsible use of those materials.
It's important to keep track of the materials that you find. There are a few ways to do this, like emailing yourself the records from the database where you found them.
Another option is to use a tool called RefWorks to build yourself your own database of materials. RefWorks keeps your stuff safe, helps you stay organized, and will even output a formatted bibliography for you.