JUNIAWAN, Egi Adha.
 PENGARUH PELATIHAN JARIMATIKA TERHADAP  PENURUNAN TINGKAT STRESS BAGI NARAPIDANA  LEMBAGA PEMASYARAKATAN (LAPAS) KELAS IIB RANGKAS BITUNG.
<strong>Symmetry: Pasundan Journal of Research in Mathematics Learning and Education</strong>, [S.l.], v. 5, n. 1, p. 59-72, july 2020.
ISSN 2548-2297.
Available at: &lt;<a href="https://journal.unpas.ac.id/index.php/symmetry/article/view/2789" target="_new">https://journal.unpas.ac.id/index.php/symmetry/article/view/2789</a>&gt;. Date accessed: 27 feb. 2021.
doi: <a href="http://dx.doi.org/10.23969/symmetry.v5i1.2789">http://dx.doi.org/10.23969/symmetry.v5i1.2789</a>.