“PENGARUH PENAMBAHAN UNSUR TEMBAGA PADA PENGECORAN TEKAN BLOK SILINDER BEKAS TERHADAP NILAI IMPAK DAN KEAUSAN : EFFECT OF ADDITION OF COPPER ELEMENTS IN THE COMPRESSION CASTING OF USED CYLINDER BLOCKS ON IMPACT VALUE AND WEAR”. 2024. Energy, Materials and Product Design 3 (2): 207-12. https://journal.unram.ac.id/index.php/empd/article/view/5407.