Nardiansyah N. Sosialisasi dan Pelaksanaan Kegiatan Gotong Royong Terbesar di Dunia World Cleanup Day (WCD) Kota Bitung. ceej [Internet]. 2020Aug.18 [cited 2025Jul.22];2(1):91-100. Available from: https://journal.yrpipku.com/index.php/ceej/article/view/141