Hariyadi, Slamet, 		Suratno, Suratno, 		Wahono, Bevo, 		Subiantoro, Agung, AND 		Permatasari, Annisa.
" Media Design "Detector Marker" based on STEM with Dragon Fruit Peel Extract for Detectionof Formaldehyde Additives at School in Agroecosystem Zone" <em>BIOEDUKASI</em> [Online], Volume 21 Number 2 (25 June 2023)