BirdLife International: Larus melanocephalusIUCN Red List of Threatened Species. Version 2013.2. 2012. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 30.5.2014. (englanniksi)
Mediterranean Gull, Larus melanocephalus (pdf) The IUCN Red List of Threatened Species. Supplementary information. International Union for Conservation of Nature and Natural Resources & BirdLife International. Viitattu 20.6.2024. (englanniksi)