Ramadhani, M.H. and Titisari, P.W. 2019. Laboratory hands-on activity: A case study in senior high school of Pekanbaru-Indonesia. JPBI (Jurnal Pendidikan Biologi Indonesia) . 5, 2 (Jun. 2019), 253–268. DOI:https://doi.org/10.22219/jpbi.v5i2.8457.