Indrianti, E., R. Manalu, J. Prianto, and Martiningsih. “Side by Side Polypropylene (PP) Yarn Manufacturing and Characterization Using Melt Spinning Machine”. Jurnal Teknologika, Vol. 15, no. 1, May 2025, pp. 777-81, doi:10.51132/teknologika.v15i1.444.