Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "ǽht-spédig." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 14.
;adj. Wealthy, rich; locuples, opulentus :-- Se is betra ðonne ðú, ǽhtspédigra feoh-gestreóna he is better than thou, richer in money-treasures Exon. 67a; Th. 248, 26; Jul. 101.