Citations are formal statements describing where you received your information from. Citations do two things:
Components of citations include, but are not limited to:
Not every citation will include every component. It depends on the resource you obtained information from. For example, a physical book will not have a URL, but an eBook will.
*Have more questions about what a citation is?* Check out this webpage from Infobase titled "Citing Sources" that answers common questions regarding citations.