“Pengaruh Kosentari Natrium Hidroksida Terhadap Ketangguhan Komposit Polyester Berpenguat Serat Serabut Kelapa: Effect of Sodium Hydroxide Cosentration on The Toughness of Polyester Composites Reinforced with Coconut Fiber”, JTIRE, vol. 1, no. 1, pp. 34–38, Jun. 2026, Accessed: Aug. 09, 2026. [Online]. Available: https://journal.grahawidya.org/index.php/tire/article/view/19