Rintia, R. and Sylvia, I. (2024) “ Validitas Lembar Kerja Peserta Didik (LKPD) Sosiologi Menggunakan Model Problem Based Learning (PBL) Materi Perubahan Sosial”, Naradidik: Journal of Education and Pedagogy, 3(2), pp. 116-125. doi: 10.24036/nara.v3i2.206.