Arifin, Nurul Laili, et al. “Pengujian Nilai Kekerasan Material ABS EH36 Hasil Proses Heat Straightening”. Jurnal Teknologi Dan Riset Terapan (JATRA), vol. 5, no. 1, June 2023, pp. 39-44, doi:10.30871/jatra.v5i1.5426.