Forsyth 2006, tr. 1447; Forsyth 1997; Fraser 2009, tr. 52–53; Woolf 2007, tr. 322–340 Forsyth, K. (2006), Koch, John T. (biên tập), “Pictish Language and Documents”, Celtic culture: A historical encyclopedia, Volume 1, Santa Barbara, California: ABC-CLIO, Inc. Forsyth, K. (1997), Language in Pictland: the case against 'non-Indo-European Pictish(PDF), Utrecht: de Keltische Draak, truy cập ngày 4 tháng 2 năm 2010Fraser, James E. (2009), “From Caledonia to Pictland: Scotland to 795”, The New Edinburgh History of Scotland, Edinburgh University Press, 1 Woolf, Alex (2007), “From Pictland to Alba 789 - 1070”, The New Edinburgh History of Scotland, Edinburgh University Press, 2
glottolog.org
Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin biên tập (2013). “Pictish”. Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology.
