Ma’dika S, Tutut Dewi Astuti. The community service journal PENDAMPINGAN OPTIMALISASI E-KATALOG PADA WHATSAPP BUSINESS DI UMKM WONTON CRISPY FATBOYS DAN UMKM OMAH JAMU WATU (JAMU KEMUNING BU ERNI). JPN [Internet]. 2024 Jul. 24 [cited 2024 Dec. 3];3(1):15-2. Available from: https://jurnalpkm.org/index.php/jpn/article/view/105