“Behind the Notifications: Direct Marketing Strategies via WhatsApp at Cikole Lembang Luwak Coffee Agrotourism: Di Balik Notifikasi: Strategi Pemasaran Langsung via WhatsApp di Agrowisata Kopi Luwak Cikole Lembang” (2026) Procedia of Social Sciences and Humanities, 9(1), pp. 571–577. doi:10.21070/xmjgx843.