Articles can be found using the database Academic Search Completewhich is a multi-disciplinary database, with more than 6,100 full-text periodicals, including more than 5,100 peer-reviewed journals. Try searching with the phrase "I have a dream" in quotation marks.
If you are using one of the computers in the labs at City Park you will not need to log in to use the databases but from any other location you will need to log in with your user name (the first part of your e-mail address before the @) and password the same as your Delgado email password (probably the last four digits of your social security number).