Arumugam, Shyielathy, Kway Eng Hock, and Zainiah@Zaniah Mohamed Isa. “The Symptomatic Behaviour Screening Tool (symbest) for Early Identification of Developmental Delays Among Children Age 3-4”. Jurnal Pendidikan Bitara UPSI 12 (December 11, 2019): 1–19. Accessed May 2, 2024. https://ejournal.upsi.edu.my/index.php/JPB/article/view/3056.