Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "leáf-full." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 608.
;adj. Believing, faithful :-- Leáffull fidelis, Mt. Kmbl. Lind. 25, 21: Jn. Skt. Lind. 20, 27. Ic cýðe on ðissan gewrte eallum leáffullum mannum hwet ic gerédd habbe wið míne arcebiscópes, Chart. Th. 347, 26. God cwæþ tó Moysen ðæt hé wolde cuman and hine ætforan ðam folce gesprecan ðæt hí ðý leáffulran wǽron God said to Moses that he would come and talk with him before the people, that they might be the more believing [v. Exod. 19, 9], Homl. Th. ii. 196, 18.