TY  - RPRT
TI  - The COPD Self-Efficacy Scale.
AU  - J K Wigal
AU  - T L Creer
AU  - H Kotses
PY  - 1991
DO  - 10.1378/chest.99.5.1193
UR  - https://pubmed.ncbi.nlm.nih.gov/2019177/
ID  - 2019177
ER  -