Docs are fine, too, or txt format.
If you have a Macintosh, with an operating system at least 10.4.11 (in other words at least 10 years old), you should be able to convert practically anything to a pdf by setting it to print and then at the print dialog window look around to see if there's a "pdf' button or drop-down menu. (On my 10.4.11 system, it's on the lower left corner.) The system can create a pdf from whatever you selected to print, including with restrictions to page selections.
I created all the pdfs of my work that way, including the one I attached in the first post (which I created while making that post).