Alhaque, Afada, Poeti Joefiani, and Esti Wungu. “Trial Application of Acceptance and Commitment Therapy Principles to Reduce the Degree of Stress Experienced by Adolescents With down Syndrome sibling(s)”. Psychological Research and Intervention 2, no. 1 (November 26, 2019): 1–10. Accessed May 15, 2025. https://jurnal.uny.ac.id/index.php/pri/article/view/24339.