Citations enable others to locate the sources used by an author. Multiple standards exist for citing resources. Understanding Citations and Citing your Research. Help you find the item you are looking for on the shelf. There are several different types of systems.
Most academic libraries use more than one.
Locating Library Materials. The code assigned to each item, regardless of classification systems used, in a library collection. This unique identification number is found both in the library catalog and on the item itself. Locating Library Materials. Detailed examination, statistical analysis, graphics, bibliography usually included.