if you haven't already, start by showing formatting marks by clicking on the "¶" icon in the "Home" tab.
To retrieve the page along with its header and footer, - either delete everything that follows this page and copy it with the very last paragraph mark of the document and paste it into the new document, - or insert a section break at the end of the page you want to copy (in the "Layout" tab, "Page Breaks," "Next Page") and select the page with its section break to copy/paste it where needed.
