Bernard, Henry, Ikki Matsuda, Goro Hanya, and Abdul Hamid Ahmad. “Effects of River Width on the Selection of Sleeping-Site by Proboscis Monkeys (Nasalis Larvatus) in Sabah, Malaysia”. Journal of Tropical Biology & Conservation (JTBC) 8 (April 20, 2016). Accessed May 3, 2024. https://jurcon.ums.edu.my/ojums/index.php/jtbc/article/view/220.