How to retrieve managed package (conga) via package.xml

For managed package we need to append the managed package name as prefix to the component.
For example APXTConga4 is added in front of conga template layout.
If you find the layout name in org, it will be only conga template layout.

        <members>APXTConga4__Conga_Template__c-APXTConga4__Conga Template Layout</members>        
        <name>Layout</name>
    </types>