By the time Huey, Dewey, and Louie walked over to the Reference Section,

they were overwhelmed with all of the different books available for checking out.

Reference Books are filed on the shelf in a very similar way to all of the non-fiction books that we just talked about.  The main difference is that the call number begins with the letters REF, followed by the Dewey subject number, and then the first three letters of  the authors last name.

These books can be checked out on an overnight basis only.

Example REF 030 WOR