Scottish National Dictionary (1700–)
1. “A wooden trough for carrying fuel” (Rxb. 1825 Jam.2).
Sc. 1818 Scott Rob Roy xxviii.:
After narrowly escaping breaking my shins over a turf back and a salting tub.
2. “A wooden bowl in which dough is mixed” (Sh. 1866 Edm. Gl.).[From Du. bak, a trough, from Fr. bac, ferry-boat, punt, also trough, mash-tub. Late Lat. bacca, “vas aquarium.” It is found in Mod.Eng. and Sc. as a technical word for a vessel used in brewing.]
You may wish to vary the format shown below depending on the citation style used.
"Back n.2". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 18 Jan 2018 <http://www.dsl.ac.uk/entry/snd/back_n2>
Try an Advanced Search