How do I save a document as .doc in Pages 5.2 not .docx?
To save Pages document as .doc (compatible with Word 1997-2004), You need to: File -> Export to -> Word..., open "Advanced options" and pick .doc.

Here's article on OSXDaily about that: http://osxdaily.com/2014/08/06/save-pages-file-as-word-format/

Image from their site: