1.
Setiawan A, Pusporini W, Dardjito H. Observation instrument for student social attitude in primary schools: Validity and reliability. Jurnal Penelitian dan Evaluasi Pendidikan [Internet]. 2020 Aug. 19 [cited 2025 May 17];24(1):76-87. Available from: https://journal.uny.ac.id/index.php/jpep/article/view/31868