^Snow, David; Perrins, Christopher M (editors). The Birds of the Western Palearctic concise edition (2 volumes). Oxford: Oxford University Press. 1998: 146–147. ISBN 019854099X.引文使用过时参数coauthors (帮助)
^Sinclair, Ian; Hockey, Phil; Tarboton, Warwick. SASOL Birds of Southern Africa. Cape Town: Struik. 2002: 74. ISBN 1868727211.引文使用过时参数coauthors (帮助)