Widyaningrum, Melvin, and darni darni. “Depresi Sebagai Problem Behavior Disorder Di Dalam Novel Kupu Wengi Mbangun Swarga Karya Tulus S (Pendekatan Psikologi Skinner)”. Jurnal Online Baradha 17, no. 1 (January 8, 2021): 1–26. Accessed June 28, 2025. https://ejournal.unesa.ac.id/index.php/baradha/article/view/37580.