Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin biên tập (2013). “Greek”. Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology.
B. Joseph (2001): "Ancient Greek". Trong: J. Garry et al. (eds.) Facts about the World's Major Languages: An Encyclopedia of the World's Major Languages, Past and Present. (Online Paper)