Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "un-feor." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 734.
, un-feorr; adv. Not far off.I. marking position, at no great distance off, (1) where the point from which the distance is measured is given by an adverb :-- Ðǽr wæs unfeorr (-feor, MS. A.) án swýna heord erat non longe ab illis grex porcorum, Mt. Kmbl. 8, 30. Ðá geseah hé deófol ðǽr unfeor standan, Blickl. Homl. 227, 24. (2) with dative :-- Ðá hé wæs unfeor ðam húse cum non longe esset a domo, Lk. Skt. 7, 6. Ðæt is unfeor ðære byrig Neapoli quod est non longe a Neapoli, Bd. 4, 1; S. 563, 30: Cd. Th. 125, 22; Gen. 2083.