Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "land-sceap." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 605.
, es; n. A district, tract of country, land :-- Swá hé on landsceape stille stande ðǽr hine storm ne mæg wind áwecgan as if it [the vessel] stand still on land, where storm or wind cannot move it, Andr. Kmbl. 1002; An. 501. v. land-scipe.