Kaensige, Aprilia Loisita, and Meicheil Yohansa. “PENGGUNAAN APLIKASI CLASS123 SEBAGAI UPAYA MENINGKATKAN KETERLIBATAN PERILAKU SISWA KELAS XII IPA DI SUATU SMA DI KOTA TANGERANG [THE USE OF THE CLASS123 APPLICATION AS AN ATTEMPT TO IMPROVE GRADE 12 SCIENCE STUDENTS’ BEHAVIORAL ENGAGEMENT IN A HIGH SCHOOL IN TANGERANG]”. JOHME: Journal of Holistic Mathematics Education, vol. 2, no. 1, Dec. 2018, pp. 57-70, doi:10.19166/johme.v2i1.940.