Hengki Mangiring Parulian Simarmata; Henry Dunan Pardede; Doris Yolanda Saragih; Firinta Togatorop; Daulat Nathanael Banjarnahor. Empowering Rural Communities through Coffee Bean Processing Training for Competitive Value Creation in Motung Village, Toba Regency. ARDHI 2025, 3, 124-132.