Manalu, Subiantoni, 		Situmorang, Try, AND 		Debataraja, Semangat.
" EVALUAIS PERENCANAAN JALAN PARTIBI LAMA - SIOSAR, KECAMATAN MEREK (STA 4+000 S/D STA 6+000) KABUPATEN KARO" <em>JURNAL ILMIAH TEKNIK SIPIL</em> [Online], Volume 11 Number 2 (20 August 2022)