Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "dæg-hwámlíce." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 761.
;adv. Daily; quotidie :-- Ic dæghwamlíce mid eów wæs quotidie eram apud vos, Mk. Bos. 14, 49. Se bróðor dæghwamlíce wæs wyrse and wyrse the brother was daily worse and worse, Bd. 4, 32; S. 611, 24.