Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "a-berend-líc." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 3.
.Add :-- Swilc forgifnes swilce hit for Gode gebeorhlic sý, and for weorulde áberendlic, L. Edg. ii. 1; Th. i. 266, 6. Dóm . . . for worolde áberendlic, L. Eth. vi. 10; Th. i. 318, 7. v. un-áberendlíc, -e.