Sayfullah. S, Muh., et al. “Pengaruh Penambahan Serat Sabut Kelapa Dan Tempurung Kelapa Terhadap Nilai Kuat Tekan Batako”. SCEJ (Shell Civil Engineering Journal), vol. 6, no. 2, Dec. 2021, pp. 54-58, doi:10.35326/scej.v6i2.2104.