Eunnike Adelina and Laurentia Henrieta Permita Sari Purba and Vinsa Cantya Prakasita  (2023) FOOD COMPOSITION AND PREFERENCE OF CAPTIVE JAVAN LANGUR (TRACHYPITHECUS AURATUS) IN GEMBIRA LOKA ZOO, YOGYAKARTA.  JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS, 9 (3).  pp. 506-513.  ISSN 2685-7332