Fishpool, Lincoln; Tobias, Joseph (2005). "Family Pycnonotidae (Bulbuls)". del Hoyo, Josep; Elliott, Andrew; Christie, David (Ed.). Handbook of the Birds of the World. Volume 10, Cuckoo-shrikes to Thrushes. Barcelona: Lynx Edicions. ss. 247-248. ISBN84-87334-72-5.