What is and what isn't common knowledge will depend on your intended audience. A paper written for a faculty member at ABAC can assume that the reader has knowledge about the college that would be considered common by students and employees of the school. However, the same paper written for a distance learning program at Florida State University would need to provide more citations about ABAC, since they would not have the same familiarity with the college. Always take into account who your audience is when deciding whether or not to cite.
Questions about the quality of a source? Does it pass some but not all of the CRAAP test? If you're really not sure whether or not a source is credible, ask a librarian! Contact information for the Instructional Services Librarian can be found on the first page of this guide.
Currency: the timeliness of the information
Relevance: the importance of the information for your needs
Authority: the source of the information
Accuracy: the reliability, truthfulness, and correctness of the content, and
Purpose: the reason the information exists