Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "habban." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 768.
, tó habbanne, hæbbene; pres. part. hæbbende; pres. indic. ic hæbbe, hafa, ðú hæfst, hafast, he hæfþ, hafaþ, pl. habbaþ, hæbbaþ; p. hæfde; subj. hæbbe, pl. hæbben, habban; imper. hafa, pl. habbaþ; pp. hæfed. I.cum acc. To HAVE, possess, hold, keep :-- Swylce getrýwþa swá se cyng æt him habban wolde such pledges as the king wished to have from him, Chr. 1093; Erl. 229, 19. Búton se biscop hie mid him habban wille unless the bishop want to have it with him, Past. Pref. Swt. 9, 6.