SUGARDJITO, JITO SUGARDJITO, and JOHN G. H. CANT. “GEOGRAPHIC AND SEX DIFFERENCES IN POSlTIONAL BEHAVIOR OF ORANG-UTANS”. Treubia 31, no. 1 (March 7, 2025): 31–41. Accessed December 6, 2025. https://ejournal.brin.go.id/treubia/article/view/9675.