SAILUN, Betty; PUTRI, Miranti Eka; HANDAYANI, Pera. AN ANALYSIS OF SCHOOL-WIDE TOKEN ECONOMY SYSTEM ON CHALLENGE BEHAVIOR OF MENTAL RETARDATION’ STUDENTS AT SLBN PENBINA PEKANBARU. Perspektif Pendidikan dan Keguruan, Pekanbaru, Riau, Indonesia, v. 5, n. 9, 2017. Disponível em: https://journal.uir.ac.id/index.php/Perspektif/article/view/734. Acesso em: 2 may. 2024.