Cahyadi, Untung. “METODE PENILAIAN MEDIA LUAR GRIYA TERHADAP RISIKO KESELAMATAN DI JALAN TOL”. Jurnal Jalan Jembatan, vol. 32, no. 2, Feb. 2018, pp. 87-102, https://binamarga.pu.go.id/jurnal/index.php/jurnaljalanjembatan/article/view/167.