There are many different subject approaches you can take in researching disabilities.
Medical Theme - links resources to search for books and articles on medical aspects of the Disabilities.
Psychological Theme - links to resources to search for books and articles on the psychology of disabilities, self concept, writing as therapy, etc.
Sociological Theme - links to resources for books and articles on the sociology of disabilities, discrimination against people with handicaps, etc.
Annotated Bibliography - links to the websites giving information on how to do an annotated bibliography with some examples.
Citing- links to APA,Chicago, MLA & Turabian style sheets information to put your references in a format
Websites - How to identify reliable websites