Sidabutar, G. S., and I. K. Dharsana. “Pengaruh Model Pembelajaran Kooperatif Tipe Two Stay Two Stray Melalui Lesson Study Terhadap Hasil Belajar IPA”. MIMBAR PGSD Undiksha, vol. 6, no. 2, Oct. 2018, doi:10.23887/jjpgsd.v6i2.19463.