Sulastri Sipapaga, Sri Rezeki Pane. The Effect of Age And Work Period On Teaching Quality Of Economics Teachers At SMK N 1 Nainggolan Samosir T.P 2015/2016. OJE [Internet]. 2023 Aug. 30 [cited 2025 Sep. 9];2(2):53-7. Available from: https://journal.outlinepublisher.com/index.php/OJE/article/view/169