Be careful not to delete duplicate references that you have:
If these references are deleted you may have problems updating your citations and bibliography.
Before deleting duplicate references always check which folders they are copied to and also consider whether you have cited them using Write-N-Cite.
Each reference will tell you which folder(s) it is copied to. This example shows that the reference has been copied to the Chapter 1; MgtRefStyle and Newspaper Articles folders.
Check regularly for duplicate references to ensure you delete them before they are used. Three ways to identify duplicates are described below.
Each time you export references from journal databases and library catalogues you will get an option to View Duplicates. This is possibly the best time to deal with duplicates to ensure you do not use them.
To check your whole RefWorks database:
To check if there are duplicate references to those in a particular folder: