Prasetyo, Anang, Rahmat Widadi, and I Wayan Adiyasa. 2015. “ECTOC (ELECTRICAL CARBON DIOXIDE TO OXYGEN CONVERTER) TO ADD OXYGEN IN THE ROOMS OF BOARDING HOUSES”. Pelita - Jurnal Penelitian Mahasiswa UNY 8 (1). https://journal.uny.ac.id/index.php/pelita/article/view/2757.