Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "á-cræftan." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 6.
;p. de; pp. ed To devise, plan, contrive as a craftsman; excogitare :-- Úton ðeáh hwæðere acræftan hú we heora, an ðyssa nihta, mágan mǽst beswícan let us however plan how we can, in this night, most weaken them, Ors. 2, 5; Bos. 47, 19.