Zainul Ikhwan, R. Hamdani Harahap, Lita Sri Andayani, and Miswar Budi Mulya, “THE ECONOMIC POTENTIAL OF WASTE MANAGEMENT IN PENYENGAT ISLAND TOURISM, TANJUNGPINANG CITY, RIAU ISLAND PROVINCE, INDONESIA”, J Arch.Egyptol, vol. 18, no. 4, pp. 3043-3065, Feb. 2021.