Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "gang." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 361.
.Add:I.going, walking, moving on foot, step. (1) of living beings :-- Þǽr nǽfre feóndes ne bið gang on lande, An. 1696. Petrus mid his gange getácnode ǽgðer ge ðá strangan ge ðá unstrangan on Godes folce, Hml. Th. ii. 390, 16. Þurh his fóta gange ambulando, Bd. 4, 3; Sch. 349, 14. Gif ic míne heorde þrafige on gancge (in ambulando), R. Ben. 120, 20. Tó ráde oþþe tó gange for riding or walking, Ll. Th. i. 232, 15. Wið fóta sáre fram miclum gange, Lch. ii. 68, 16 : 6, 18. Hrædne gang rapidum gressum. An. Ox. 50, 43.