If you find a PDF dated "2021," verify the edition by looking at the copyright page. The 10th edition copyright is 2018 (Cengage). The 9th edition is 2012. Both are still useful, but problem numbers differ.
This is the primary platform for legal e-books and student resources. Palme Yayınevi: Check their official Akademik Kitaplar section for the Turkish " Fen ve Mühendislik İçin Fizik 3. Cilt Turcademy: serway fizik 3 pdf 2021
Often hosts student-uploaded versions like this Serway 3 Modern Fizik document. If you find a PDF dated "2021," verify
The 2021 release is often part of the "Technology Update" (Teknoloji Güncellemeli) series, which integrates modern pedagogical tools and updated problem sets. serway fizik 3 pdf 2021
The primary source for the Turkish edition.