Muhammad, F., F. Yusrizal, A. Nawawi, R. Nurita, N. Yulia, and J. jumiati. “Analysis of the 4A Concept (Attraction, Amenity, Accessibility, and Ancillary Services) at the Mangrove Sungai Bersejarah Ecotourism Destination, Siak Regency”. JURNAL KAJIAN PARIWISATA DAN BISNIS PERHOTELAN, Vol. 7, no. 1, Apr. 2026, pp. 12-25, doi:10.24036/jkpbp.v7i1.85572.