Young Adults (under 18) are invited for a free play session of Super Smash Brothers Brawl to celebrate the beginning of summer! Free Snacks and Drinks will be provided. Sign up is requested - either online or contact the referenceQuestions that you ask of library staff that require knowledge of the content of the collection or other resources such as those on the web. Sometimes you are referred to the answer, hence Reference. Reference can also refer to our reference materials that are often encyclopedic books that have many volumes and a concentrated number of facts and/or statistics. These materials usually have an overnight loan period so they are available in the library most of the time. desk.