Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "níd-faru." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 65.
, e ; f. A journey one is forced to take, death :-- Fore there neidfaerae naenig uuirthit thoncsnotturra than him tharf sié, Archaeologia, vol. xxviii. p. 357. v. níd-gedál.