Page 27 of the Cover Letter Tutorial
Accentuating the Positive: Substantiating Qualifications
Value judgments are more credible if substantiated by third parties.
There’s nothing wrong with making value judgments about your talents and qualifications.
But they’ll carry more weight if you say they are substantiated by former employers or professors (be sure your third party will back you up on any claims you make!)
Follow this link to see some examples of substantiating qualifications.
Lost? Check out the Map to the Cover Letter Tutorial… or go to the home page of the Cover Letter Tutorial for Developing Stunningly Effective Job-Search Cover Letters.