While you are writing your paper in Microsoft Word, you can easily find and insert a citation using EndNote's Insert Citations tool.
Note: You first have to install the Cite While You Write feature.
To find and cite your source:
The citation appears at the cursor location, formatted according to the bibliographic style specified. The reference information is also automatically added to the bibliography.
If you want to delete or modify a citation in your Word document, refer to the list below.
Ways to modify a citation
From: http://www.myendnoteweb.com/help/en_us/ENW/hw_citereference.htm
Each time you find and insert a citation in your document, the bibliography automatically formats according to the style selected. You can change the bibliographic style or other layout options in the Format Bibliography window.
This will format your citations and bibliography according to the style and appearance specified.
From: http://www.myendnoteweb.com/help/en_us/ENW/hw_bibliography.htm