HASIBUAN, Nailul Himmi.
 PERBEDAAN SELF EFFICACY  MATEMATIS SISWA ANTARA PEMBELAJARAN BERBASIS MASALAH BERBANTUAN GEOGEBRA  DAN AUTOGRAPH DI MAN 1 MEDAN.
<strong>PYTHAGORAS: JURNAL PROGRAM STUDI PENDIDIKAN MATEMATIKA</strong>, [S.l.], v. 5, n. 2, may 2017.
ISSN 2615-7926.
Available at: &lt;<a href="https://www.journal.unrika.ac.id/index.php/jurnalphythagoras/article/view/469" target="_new">https://www.journal.unrika.ac.id/index.php/jurnalphythagoras/article/view/469</a>&gt;. Date accessed: 14 feb. 2026.
doi: <a href="https://doi.org/10.33373/pythagoras.v5i2.469">https://doi.org/10.33373/pythagoras.v5i2.469</a>.