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Putri, Wiwik Kastria and Sormin, Elferida and Purba, Leony Sanga Lamsari (2021) Improvement of Chemistry Learning Outcomes of Class XI Students High School Through Peer Tutors on Colloid Material. In: Proceeding Atlantis Press Science Web of Science. Atlantis Press. (In Press)
Putri, Wiwik Kastria (2018) PENINGKATAN HASIL BELAJAR KIMIA SISWA KELAS XI SEKOLAH MENENGAH ATAS ANGKASA 2 JAKARTA MELALUI METODE TUTOR SEBAYA PADA MATERI KOLOID TAHUN AJARAN 2017/2018. S1 thesis, Universitas Kristen Indonesia.