Maulidia, Afifah, et al. “DEVELOPMENT OF ASSESSMENT INSTRUMENTS ON CREATIVE THINKING SKILL IN ENVIRONMENTAL POLLUTION MATERIALS”. JPPIPA (Jurnal Penelitian Pendidikan IPA), vol. 5, no. 2, Dec. 2020, pp. 39-44, doi:10.26740/jppipa.v5n2.p39-44.