Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "tallíce." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 72.
;adv. In a way that deserves blame, reprehensibly :-- Tállíce reprehensibiliter, Wrt. Voc. i. 54, 46. Ne forseó gé Godes ðearfan, ðeáh ðe hí tállíce hwæt gefremman, Homl. Th. i. 332, 13. v. un-tállíce; tǽllíce.