FIRMANSAH, Fery.
 The Odd Harmonious Labeling on Variation of the Double Quadrilateral Windmill Graphs.
<strong>Jurnal ILMU DASAR</strong>, [S.l.], v. 18, n. 2, p. 109-118, oct. 2017.
ISSN 2442-5613.
Available at: &lt;<a href="https://jurnal.unej.ac.id/index.php/JID/article/view/5648" target="_new">https://jurnal.unej.ac.id/index.php/JID/article/view/5648</a>&gt;. Date accessed: 20 apr. 2024.
doi: <a href="https://doi.org/10.19184/jid.v18i2.5648">https://doi.org/10.19184/jid.v18i2.5648</a>.