Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "ge-æþele." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 285.
;adj. Congenial, in accordance with one's nature, race [v. æðelo]; congĕnĭtus :-- Swá him geæðele wæs from cneómǽgum as was to them natural from their kindred, Chr. 937; Erl. 112, 7; Æðelst. 7. v. on-æðele. cf. gecynde.