Ramadhoni, Febrina Suci, dan Martina Asiati Napitupulu. “THE DIFFERENCES OF STUDENTS™ LEARNING ACHIEVEMENT BY POSTER DISPLAYING ON ENVIRONMENT TOPIC GRADE X SMA OF MEDAN”. Jurnal Pelita Pendidikan 4, no. 2 (Juni 30, 2016). Diakses Juli 4, 2025. https://jurnal.unimed.ac.id/2012/index.php/pelita/article/view/4047.