Wiyadi, W, et al. “Strengthening PCIM and PRIM Muhammadiyah Organizations Across Malaysia through Basic Spiritual Leadership Training: Penguatan Organisasi PCIM Dan PRIM Muhammadiyah Di Seluruh Malaysia Melalui Pelatihan Kepemimpinan Dan Spiritual Dasar”. Prosiding University Research Colloquium, vol. 18, Feb. 2024, pp. 538-45, https://repository.urecol.org/index.php/proceeding/article/view/3052.