↑ Summers-Smith, J. Denis (2009). "Family Passeridae (Old World Sparrows)". In del Hoyo, Josep; Elliott, Andrew; Christie, David. Handbook of the Birds of the World. Volume 14: Bush-shrikes to Old World Sparrows. Barcelona: Lynx Edicions. ISBN 978-84-96553-50-7.
1 2 Clement, Peter; Harris, Alan; Davis, John (1999). Finches and Sparrows: An Identification Guide (Helm Identification Guides). Christopher Helm Publishers Ltd. ISBN 0713652039.
