Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "ilfig." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 59.
;adj. Affected by elves [?], mad, frantic :-- Fanaticus, i. minister templi, futura præcinens, vel ylfig, Wrt. Voc. ii. 147, 40. Ylfie vel mónaþseóce comitiales, i. e. garritores,132, 26. Comitiales, lunaticos wanseóce i. garritores, ylfie, Hpt. Gl. 519. 44.