SUMARNI, Sumarni.
 PENINGKAATAN HASIL BELAJAR BIOLOGI MENGGUNAKAN MODEL KOOPERATIF NHT  PADA MATERI SISTEM PERNAPASAN DAN EKSRESI KELAS XI IPA.1 SMAN 1 KEPENUHAN ROKAN HULUTAHUN PELAJARAN 2013/2014.
<strong>JURNAL PENDIDIKAN ROKANIA</strong>, [S.l.], v. 5, n. 2, p. 183-195, july 2020.
ISSN 2548-4141.
Available at: &lt;<a href="https://e-jurnal.stkiprokania.ac.id/index.php/jpr/article/view/321" target="_new">https://e-jurnal.stkiprokania.ac.id/index.php/jpr/article/view/321</a>&gt;. Date accessed: 12 july 2026.
doi: <a href="https://doi.org/10.37728/jpr.v5i2.321">https://doi.org/10.37728/jpr.v5i2.321</a>.