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, vol. 4, no. 2, Juni 2016, doi:10.24114/jpp.v4i2.4047.