Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "þeów-dóm." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 729.
, es; m. Service; in an unfavourable sense servitude, slavery, bondage, thraldom :-- Ðes þeówdóm haec seruitus, Ælfc. Gr. 9, 33; ZuP. 60, 7. Þeówdóm mancipatio, Wrt. Voc. i. 59, 57: famulatus, ii. 147, 35. Þeówdómum famulatibus, 34, 3. Ðeówdóm is twyfeald ... Is óðer ðeówt neádunge búton lufe, óðer is sylfwilles mid lufe, se gedafenaþ Godes ðeówum, Homl. Th. ii. 524, 3. I. in the more favourable sense :-- For lufan ðæs godcundan ðeówdómes, Bd. 4, 23; S. 593, 31. Godes þeówdómes, Blickl. Homl. 23, 18.