Cite the scanned version of the original dicionary like this:
Toller, T. Northcote, and Joseph Bosworth. "deóp." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth : Supplement. Oxford: Clarendon Press, 1921. 149.
, dióp; adj. DEEP, profound, stern, awful, solemn; prŏfundus, grăvis, sōlemnis :-- Ðes pytt is deóp this well is deep, Jn. Bos. 4, 11. Deóp wæter the deep water, Exon. 54 b; Th. 193, 19; Az. 124. Fíftena stód deóp ofer dúnum flód elna the flood stood fifteen ells deep over the hills, Cd. 69; Th. 84, 15; Gen. 1398. Noe oferláþ ðone deópestan drencflóda Noah sailed over the deepest of drowning floods, 161; Th. 200, 29; Exod. 364. Hú héh and deóp hell seó how high and deep hell is! 228; Th. 309, 9; Sat. 707.
, dýp, dióp, es; n: dýpe, an; f. Depth, the deep, abyss; prŏfundum :-- Ne me forswelge sǽ-grundes deóp ne me absorbeat profundum, Ps. Th. 68, 15. Adó me of deópe deorces wæteres libĕra me de profundo aquārum, 68, 14. Ic slóh gársecges deóp I struck the ocean's deep, Cd. 157; Th. 195, 24; Exod. 281: Beo. Th. 5091; B. 2549: Exon. 93 b; Th. 351, 21; Sch. 83.