DAFA RIZKY PRAYOGA; DINI, A. Z.; TARIGAN, L. A.; SARI, P. A.; LUBIS, D. P.; PERMANA, S. ANALYSIS OF CONCEPT 3A IN TOURISM DEVELOPMENT (CASE STUDY: DUSUN IV, DESA DENAI LAMA, KAB. DELI SERDANG). Jurnal Samudra Geografi, v. 5, n. 2, p. 114 - 126, 30 Jun. 2022.