Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "caru." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 146.
.Add :-- Caru cura, Wrt. Voc. i. 83, 60. I.care, trouble :-- Gind ealne middangeard caru and gewin and ege crudelis ubique luctus, ubique pavor, Ors. 2, 4; S. 72, 21. Hwæt bewearp þé on þás care and on þás gnornunga quid est quod te in moestitiam luctumque dejecit?, Bt. 7, 2; F. 16, 26. Hí fácnum wordum heora aldorþægn unreordadon on cearum (d. pl.) cwidum (?cwíðdun, Cf. in cearum cwíðað, Gú. 194), Sat. 67. Hé wiste ferhð guman cearum (grievously; cf. cearum cwíðende, Cri. 892) on clommum, Ger. 2794.