(en) van Balen, B. & Kirwan, G.M., 2018. Principe White-eye (Zosterops ficedulinus). In: del Hoyo, J., et al (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/60225 on 20 December 2018).
