Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "droht." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 158.
, es; m? Manner or condition of life; vitæ condĭtio :-- Hú he his wísna trúwade, drohtes, on ðære dimman ádle how he trusted in his morals, his manner of living, in that hidden malady, Exon. 49 b; Th. 171, 31; Gú. 1135. v. drohtaþ.