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Piper, P. J.; Ochoa, J.; Lewis, H.; Paz, V.; Ronquillo, W. P. (2008). "The first evidence for the past presence of the tiger Panthera tigris (L.) on the island of Palawan, Philippines: extinction in an island population". Palaeogeography, Palaeoclimatology, Palaeoecology. 264 (1–2): 123–127. Bibcode:2008PPP...264..123P. doi:10.1016/j.palaeo.2008.04.003.
Ochoa, J.; Piper, P. J. (2017). "Tiger". Dalam Monks, G. Climate Change and Human Responses: A Zooarchaeological Perspective. Springer Publishing. hlm. 79–80. ISBN978-9-4024-1106-5. Diarsipkan dari versi asli tanggal 2023-08-16. Diakses tanggal 2019-09-05.
Nowell, K.; Jackson, P. (1996). "Tiger"(PDF). Wild Cats: Status Survey and Conservation Action Plan. Gland, Switzerland: IUCN/SSC Cat Specialist Group. hlm. 55–64. ISBN978-2-8317-0045-8. Diarsipkan(PDF) dari versi asli tanggal 2019-02-05. Diakses tanggal 2019-09-05.