I GEDE PUTU SUARDANA; MELANIA, Melania; ASRUNI, Asruni. Optimizing Whatsapp Groups As A Multilayer Information Bridge From PPIC To Production: Rotogravure Flexible Packaging Industry In Sidoarjo. PESHUM : Jurnal Pendidikan, Sosial dan Humaniora, [S. l.], v. 5, n. 4, p. 9378–9389, 2026. DOI: 10.56799/peshum.v5i4.17354. Disponível em: https://al-haramjournal.co.id/PESHUM/article/view/17354. Acesso em: 7 aug. 2026.