↑ Wilkinson, Richard James (1932). "udang". A Malay-English dictionary (romanised). II. Mytilini, Yunani: Salavopoulos & Kinderlis. m/s. 625 – melalui TROVE, Perpustakaan Negara Australia.
↑ Wilkinson, Richard James (1932). "pĕkakak". A Malay-English dictionary (romanised). II. Mytilini, Yunani: Salavopoulos & Kinderlis. m/s. 228 – melalui TROVE, Perpustakaan Negara Australia.
↑ Bancroft, Wilder; Chamot, Emile M.; Merritt, Ernest; Mason, Clyde W. (1923). "Blue feathers" (PDF). The Auk. 40 (2): 275–300. doi:10.2307/4073818. JSTOR4073818. Diarkibkan (PDF) daripada yang asal pada 12 July 2015. Dicapai pada 3 March 2013.
1 2 Woodall, Peter (2001). "Family Alcedinidae (Kingfishers)". Dalam del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi (penyunting). Handbook of the Birds of the World. 6, Mousebirds to Hornbills. Barcelona: Lynx Edicions. m/s. 103–187. ISBN978-84-87334-30-6.
