Hidayat, H., S. Rohiat, and A. Bahar. “Implementation of Cooperative Learning Model by Greeting and Question Technique to Improve the Learning Outcomes and Activities Students in SMA 1 Bengkulu”. IJCER (International Journal of Chemistry Education Research), vol. 3, no. 2, May 2020, pp. 66-69, doi:10.20885/ijcer.vol3.iss2.art3.