Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "níd-bád." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 65.
, e; f. An exaction, a due, toll :-- Ic Æðelbald Myrcna cincg wæs beden from bisceope Milréde ðæt ic him áléfde alle nédbáde tuegra sceopa, Chart. Th. 28, 25 : 29, 8. Hé nymeþ nýdbáde he (Grendel) takes toll, Beo. Th. 1200; B. 598. v. bádian, bǽdan, níd debitum, nídgafol, and next word.