Spring Bed Business as a Livelihood for the People of Sei Semayang Village, Sunggal District, Deli Serdang Regency. JISIP (Jurnal Ilmu Sosial dan Pendidikan), [S. l.], v. 8, n. 1, p. 227–241, 2024. DOI: 10.58258/jisip.v8i1.6113. Disponível em: https://ejournal.mandalanursa.org/index.php/JISIP/article/view/6113. Acesso em: 16 jun. 2026.