Mapa, Mohammad Tahir, Ubong Imang, Aliakbar Gulasan, Nordin Sakke, and Abdul Hair Beddu Asis. 2017. “Elemen Kitar Semula Ke Arah Tapak Pelupusan Mapan Di Malaysia: Satu Penelitian Di Tapak Pelupusan Kayu Madang, Dewan Bandaraya Kota Kinabalu, Sabah: Recycle Element towards Sustainable Landfill in Malaysia: A Study in Kayu Madang Landfill, City Hall of Kota Kinabalu, Sabah”. GEOGRAFI 5 (1):26-37. https://ejournal.upsi.edu.my/index.php/GEOG/article/view/2024.