MUTMAINNAH; SADIQIN, A. Pengaruh Pandemi Covid-19 Terhadap Volume Penjualan PT. Surabaya Makmur Jaya Tahun 2020. JURNAL EKONOMI, MANAJEMEN, BISNIS, DAN SOSIAL (EMBISS), [S. l.], v. 1, n. 4, p. 334–339, 2021. Disponível em: https://embiss.com/index.php/embiss/article/view/43. Acesso em: 4 jul. 2025.