Ihsan, Moh., dkk. “Feed Preferences of Yellow-Crested Cockatoo (Cacatua Sulphurea Sulphurea) in Pasoso Island, Central Sulawesi”. Jurnal Penelitian Hutan Dan Konservasi Alam, vol. 18, no. 2, Desember 2021, hlm. 183-9, doi:10.59465/jphka.v18i2.625.