Triwahyuni, Palupi and Simbolon, Mangadar and Simbolon, Charissa Angie Victorine (2023) Description of Stress Levels among Nursing Students in West Indonesia. In: 10th International Scholars' Conference: Full Paper Proceedings. AUP Research Office, Philippines, pp. 1131-1138.

Simbolon, Mangadar and Triwahyuni, Palupi and Simbolon, Charissa Angie Victorine (2023) Religious Coping of Theology Students. In: 10th International Scholars' Conference. AUP Research Office, Philippines, pp. 1172-1178.

Hutagalung, Stimson and Nainggolan, Bartholomeus Diaz and Hendriks, Alvyn Cesarianto and Walukouw, Yane Restuwaty and Hutabarat, Reymand M. and Karosekali, Ester and Manurung, Freddy and Sianipar, Joseph H. and Simbolon, Mangadar and Hutabarat, Mel S. and Sagala, Rudolf Weindra (2021) Surat Pencatatan Ciptaan 2021. Kementerian Hukum dan Hak Asasi Manusia.