Bismark, M. (1980). Populasi dan tingkahlaku bekantan (Nasalis larvatus) di Suaka Margasatwa Tanjung Puting, Kalimantan Tengah =: Behaviour and population density of proboscis moneky (Nasalis larvatus) at Tanjung Puting Game Reserve, Central Kalimantan. Lembaga Penelitian Hutan.
Παραπομπή σε μορφή Chicago (17η εκδ.)Bismark, M. Populasi Dan Tingkahlaku Bekantan (Nasalis Larvatus) Di Suaka Margasatwa Tanjung Puting, Kalimantan Tengah =: Behaviour and Population Density of Proboscis Moneky (Nasalis Larvatus) at Tanjung Puting Game Reserve, Central Kalimantan. Bogor: Lembaga Penelitian Hutan, 1980.
Παραπομπή σε μορφή MLA (8th εκδ.)Bismark, M. Populasi Dan Tingkahlaku Bekantan (Nasalis Larvatus) Di Suaka Margasatwa Tanjung Puting, Kalimantan Tengah =: Behaviour and Population Density of Proboscis Moneky (Nasalis Larvatus) at Tanjung Puting Game Reserve, Central Kalimantan. Lembaga Penelitian Hutan, 1980.