Hanifah, Amalia, Erman Erman, and Dhita Ayu Permata Sari. “SOME CONSTRAINTS IN IMPLEMENTING NUMBERED HEADS TOGETHER COOPERATIVE MODEL IN ONLINE LEARNING IN THE COVID-19 PANDEMIC”. PENSA: E-JURNAL PENDIDIKAN SAINS 10, no. 1 (January 9, 2022): 81–85. Accessed January 16, 2025. https://ejournal.unesa.ac.id/index.php/pensa/article/view/41599.