Follow these steps to insert references in your PowerPoint slides.
Open the EndNote library that contains the references that you wish to insert in your PowerPoint slides.
Start PowerPoint and open the document you are writing.
Select a style from the Output Styles menu.
Position the cursor in the text where you would like to add the reference.
From the EndNote tab, select Insert Reference to display an EndNote Find & Insert My References dialog.
In the text box, enter your search query. This could be an author’s last name, a year, a keyword, or any other combination terms found in the reference.
Click Find to display a list of matching references.
Select one or more items from the dialog.
Click the Insert button to insert the citation and format it as defined by the currently selected output style.
The Output Styles menu lists the styles that are currently selected as your "favorites" in the Style Manager. To select a style that is not in the list, click Select Another Style to display an EndNote Styles dialog.
Insert Selected Reference(s)
Open the EndNote library that contains the references that you wish to insert in your PowerPoint document.
Start PowerPoint and open the document you are writing.
Select a style from the Output Styles menu.
Position the cursor at the location where you would like to add the references.
From the EndNote tab, select Go to EndNote.
Highlight the desired reference(s) in your EndNote library.
From the EndNote tab, select Insert Selected Reference(s).