Priyo, M., and A. Gunawan. “Analisis Kelayakan Investasi Asphalt Mixing Plant (Studi Kasus: PT Perwita Karya Di Base Camp Piyungan, Bantul)”. Semesta Teknika, vol. 12, no. 2, Mar. 2016, pp. 199-08, doi:10.18196/st.v12i2.741.