Studi ekstrak daun cengkeh sebagai inhibitor korosi ramah lingkungan (green corrosion inhibitor) pada baja api 5L dalam lingkungan NaCl 3.5% = Study of clove leave extracts as green corrosion inhibitor on steel api 5l in NaCl 3.5% environment / Ardiles Jeremia Sitorus - Sitorus, Ardiles Jeremia, author (2013)