Purwani, N.P.R., Darsana, I.W. and Manuaba, I.B.S. 2018. Pengaruh Model Pembelajaran Picture and Picture Berbasis Portofolio Terhadap Hasil Belajar IPA Siswa. International Journal of Elementary Education. 2, 3 (Nov. 2018), 165–172. DOI:https://doi.org/10.23887/ijee.v2i3.15955.