“Pengaruh Impregnasi Tembaga Sulfat terhadap Sifat Fisis-Mekanis Kayu Sengon dan Kelapa: Effect of Copper Sulfate Impregnation on the Physical-Mechanical Properties of Sengon and Coconut Wood”. 2026. PERENNIAL 22 (2): 93-100. https://doi.org/10.24259/perennial.v22i2.53690.