Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "háma." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 506.
.Add: a natural covering, integument, membrane, skin, slough of a serpent :-- Inluvies secundarum hama in quo fit parvulus, Wrt. Voc. ii. 110, 61. Mǽdenlicum haman virginali puerperio, Hpt. Gl. 414, 50. Matrice cildhaman puerperio, utero haman, 436, 6. Seó nǽddre áwurpð ǽlce geáre hire ealdan haman, and bið ðonne befangen mid eallníwum felle, Nap, 35. Hér cóm in gangan in spíder (inspíder?) wiht hæfde him his haman on handa, Lch. iii. 42, 12. [v. N. E. D. hame. Cf. Icel. hamr a skin, especially of birds.] v.