Gulo, D., and M. M. . Bate’e. “Online Community Marketing Strategies for Building Customer Loyalty at UD. Surya in Gunungsitoli City”. Amkop Management Accounting Review (AMAR), vol. 5, no. 2, Oct. 2025, pp. 1092-9, doi:10.37531/amar.v5i2.2966.