Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "þeón." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 1052.
.On p. 1052,; l. 33, for 20 l. 16. I 1. add :-- Hí forð fremedon and þungon (profecerunt) þurh þá wununge heora geférscipes. Gr. D. 205, 5. Þonon hé forð þeón sceolde unde proficsre debuit, 200, 11. (l a) in greeting :-- Fæder mín leófa, þeóh þú an Críste wel (beneualeas in Christo), Chrd. 92, 17. (2) add :-- Þá þá hé geseah hine weaxan and þeón in Godes ege cum eum in timore Domini excrevisse videret, Gr. D. 225, 22.