Vogelstimmen vom Zilpzalp in der Datenbank von xeno-canto.org
Clement, P. (2019). Common Chiffchaff (Phylloscopus collybita). In: del Hoyo, J., Elliott,
A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/58861 on 25 February
2019).
