TY  - RPRT
TI  - Learned helplessness: performance as a function of task significance.
AU  - N F Skinner
PY  - 1979
DO  - 10.1080/00223980.1979.9915097
UR  - https://pubmed.ncbi.nlm.nih.gov/458750/
ID  - 458750
ER  -