Provide sufficient information so a listener can locate resources on her own. Give the name and title of a researcher. State the exact title and date an article or book was published. Do not be overly specific by providing such things as page numbers from a text.
Introduce resources with leads such as, "I quote...," "According to..." or "Based on..." Mix up the choice of introductory words to avoid monotony.
Do not state an entire web address in a presentation. State the organization as a resource and inform the audience the information can be found on its website. For instance, "The American Bar Association states on its website..."
State the name and credentials of anyone interviewed as a resource. For instance, "John Brown at the American Medical Association said this about the topic..."