Saroyo, Saroyo, and Hanny H Pontororing. “Pelatihan Identifikasi Dan Pengamatan Burung Bagi Pemandu Wisata Alam Tangkoko Di Kota Bitung”. Jurnal Ilmiah Sains 12, no. 1 (April 30, 2012): 8–12. Accessed May 18, 2024. https://ejournal.unsrat.ac.id/v3/index.php/JIS/article/view/395.