Nainggolan, E. M., R. R. Purba, and I. Purba. “TALI KASIH PEDULI COVID-19 DOSEN DAN MAHASISWA PROGRAM STUDI MANAJEMEN UNIVERSITAS SARI MUTIARA INDONESIA”. Jurnal Abdimas Mutiara, vol. 1, no. 2, Oct. 2020, pp. 148-52, https://e-journal.sari-mutiara.ac.id/index.php/JAM/article/view/1393.