Dear Drew,
When you are using AphasiaBank materials, we ask you to cite this paper:
MacWhinney, B., Fromm, D., Forbes, M. & Holland, A. (2011). AphasiaBank: Methods for studying discourse. Aphasiology, 25,1286-1307.
This information is in the Ground Rules for usage of TalkBank data, given on this page.
Best,
— Brian MacWhinney