INVESTIGATION METHODS IN DEVELOPMENTAL PSYCHOLOGY: METODE-METODE DALAM PENYELIDIKAN DALAM PSIKOLOGI PERKEMBANGAN. JEaC [Internet]. 2023 Aug. 30 [cited 2026 Jun. 10];3(2):225-38. Available from: https://journals.ubmg.ac.id/index.php/JEaC/article/view/1267