Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "Tíw." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 722.
, Tíg, Tí, es; m.I.the god Tiw, a Teutonic deity to whom amongst the Latin gods Mars most nearly corresponded :-- Tiig Mars, Martis, Txts. 77, 1293. Tíg, Wrt. Voc. ii. 55, 56. Tuu (Tíw?), 58, 40. Ðone Syxtum nédde Decius se cásere Tíges (Martis) deófolgylde, Shrn. 114, 9. ¶ The word occurs oftenest in the connection in which it remains--in the name of one of the days :-- On Tíwes-dæg tertia feria, R. Ben. 38, 6; R. Ben. Interl. 49, 14: Wulfst. 180, 25. On Tíwes-niht, Lchdm. iii. 146, 23.