Repi, E., 		Suriani, N., & 		Waworuntu, F.
(2019).
 The Effect of Learning Cycle 7E Model on Buffer Solution Subject on Learning Outcomes of Class XI Students of SMA N 2 Langowan.
<em>Oxygenius: Journal Of Chemistry Education, 1</em>(2), 99-106.
doi:10.37033/ojce.v1i2.118