IRAWAN, Januar Fery et al.
 Studi Karakteristik Geologi Gumuk di Kecamatan Sumbersari Kabupaten Jember Jawa Timur Ditinjau dari Analisis Petrologi.
<strong>Jurnal Teknologi Sumberdaya Mineral</strong>, [S.l.], v. 2, n. 2, p. 65-71, dec. 2021.
ISSN 2798-4850.
Available at: &lt;<a href="https://jurnal.unej.ac.id/index.php/JENERAL/article/view/28502" target="_new">https://jurnal.unej.ac.id/index.php/JENERAL/article/view/28502</a>&gt;. Date accessed: 19 may 2024.
doi: <a href="https://doi.org/10.19184/jeneral.v2i2.28502">https://doi.org/10.19184/jeneral.v2i2.28502</a>.