PRADANA PUTRA, Rizki; 						RAKA AGUNG, I Gusti Agung Pt; 						RAHARDJO, Pratolo.
 RANCANG BANGUN VENDING MACHINE MENGGUNAKAN QR CODE BERBASIS MIKROKONTROLER.
<strong>Jurnal SPEKTRUM</strong>, [S.l.], v. 6, n. 2, p. 102-111, june 2019.
ISSN 2684-9186.
Available at: &lt;<a href="https://ojs.unud.ac.id/index.php/spektrum/article/view/49788" target="_new">https://ojs.unud.ac.id/index.php/spektrum/article/view/49788</a>&gt;. Date accessed: 22 feb. 2025.
doi: <a href="https://doi.org/10.24843/SPEKTRUM.2019.v06.i02.p15">https://doi.org/10.24843/SPEKTRUM.2019.v06.i02.p15</a>.