TY  - RPRT
TI  - Research study designs: experimental and quasi-experimental.
AU  - Cheryl Bagley Thompson
AU  - Edward A Panacek
DO  - 10.1016/j.amj.2006.09.001
UR  - https://pubmed.ncbi.nlm.nih.gov/17071413/
ID  - 17071413
ER  -