Esler, Philip Francis (1998). Galatians. Routledge. էջ 29. ISBN978-0-415-11037-2. «Galatai was the Greek word used for the Celts from beyond the Rhine who invaded regions of Macedonia, Greece, Thrace and Asia Minor in the period 280-275 BCE»
Moscati, Sabatino; Grassi, Palazzo (1999). «4: Ancient Literary Sources». The Celts. Random House Incorporated. ISBN978-0-8478-2193-8.
Strobel, Karl (2013). «Central Anatolia». The Oxford Encyclopedia of the Bible and Archaeology. Oxford University Press. ISBN978-0-19-984653-5. Վերցված է 2018 թ․ մայիսի 15-ին.
One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). «Galatia». Encyclopædia Britannica (անգլերեն). Vol. 11 (11th ed.). Cambridge University Press. էջեր 393–394.