If you have the or a direct link to the page where the PDF should be, please share that so I can find the download link for you!

(like a university portal or a research database)?

It sounds like you're trying to download a specific (the Turkish word for chapter is "bölüm") or a section of a paper in PDF format.

To help you get the exact file, could you clarify a few things? of the paper or book? Which chapter (bölüm)(e.g., Bölüm 1, Bölüm 2)