Include any widget in a page for any theme. [do_widget widgetname ] or [do_widget "widget name" ] [do_widget id=widgetnamedashed-n ]or inc
setting up widgets in the widgets for shortcode sidebar. The widget's user interface (UI) is used to provide a UI for the do_widget shortcode.
add shortcode for widgets in a page (must be in the widgets for shortcode sidebar)
widgets in a page
with the default widget class and with widget_classes=none two rss feed widgets in shortcode sidebar - both will show if just name used
Don't know the id? Just type junk and view page - the debug message will show. Click on it.
After clicking on debug message - scroll down till you see the shortcodes sidebar - the widgets and their ids will be listed. Find the id of the widget you want.
Shortcode parameters to remove widget-classes in theme like the twenty-fourteen theme (avoid white text on white background)
Example of multiple rss widgets in twenty-fourteen theme