1. Pyle, P. (2022). Identification Guide to North American Birds. Part I, Second Edition. Slate Creek Press, Forest Knolls, California, USA.
2. Myers, S. (2016). Birds of Borneo. Second edition. Christopher Helm, London, UK.
3. Jenni, L., and R. Winkler (2020). Moult and Ageing of European Passerines. Second edition. Bloomsbury, London, UK.
4. Mead, C. (2008). The effects of logging on understorey birds in Borneo. Ph.D. thesis, Manchester Metropolitan University, Manchester, UK.