TY  - RPRT
TI  - Validity and reliability--what's it all about? Part 2 reliability in quantitative studies.
AU  - Alison Twycross
AU  - Linda Shields
PY  - 2004
DO  - 10.7748/paed2004.12.16.10.36.c886
UR  - https://pubmed.ncbi.nlm.nih.gov/15641352/
ID  - 15641352
ER  -