To create citations or a bibliography, follow these steps:
1. Download the Mendeley Desktop Application and the plugin for your word processor.
2. Open the Mendeley Desktop application, click on Tools, and click on the plugin for your word processor.
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For the Windows version of Word, the plugin is found under the Reference tab as shown below.
The citation plugin for the Mac version of Word is a toolbar.
If you remove it, bring it back using the View menu and selecting Mendeley from the Toolbar list.
This toolbar will appear as a separate panel for you to position where you like.
(Image Source: http://bit.ly/2SUvY4b)