Purnomo, Shidiq, et al. “Pengaruh Ketepatan Waktu Pengiriman Terhadap Kepuasan Konsumen Beton Ready Mix Sidoarjo”. RIGGS: Journal of Artificial Intelligence and Digital Business, vol. 5, no. 2, June 2026, pp. 7630-6, doi:10.31004/riggs.v5i2.9097.