Sabrina N, Arif K. The Effect Of Numbered Head Together (NHT) Cooperative Learning Model On Students Learning Outcomes On Human Respiratory System Materials At SMPN 2 Solok City. universe [Internet]. 30Jun.2023 [cited 5Feb.2025];4(1):26-1. Available from: http://universe.ppj.unp.ac.id/index.php/universe/article/view/341