Broniatowski, David A., and Tucker, Conrad. Assessing causal claims about complex engineered systems with quantitative data: internal, external, and construct validity. Systems Engineering 20.6 Web. doi:10.1002/sys.21414.

Broniatowski, David A., & Tucker, Conrad. Assessing causal claims about complex engineered systems with quantitative data: internal, external, and construct validity. Systems Engineering, 20 (6). https://doi.org/10.1002/sys.21414

Broniatowski, David A., and Tucker, Conrad. "Assessing causal claims about complex engineered systems with quantitative data: internal, external, and construct validity". Systems Engineering 20 (6). United States: Wiley Blackwell (John Wiley & Sons). https://doi.org/10.1002/sys.21414. https://par.nsf.gov/biblio/10069711.

@article{osti_10069711,
place = {United States}, title = {Assessing causal claims about complex engineered systems with quantitative data: internal, external, and construct validity}, url = {https://par.nsf.gov/biblio/10069711}, DOI = {10.1002/sys.21414}, abstractNote = {Not Available}, journal = {Systems Engineering}, volume = {20}, number = {6}, publisher = {Wiley Blackwell (John Wiley & Sons)}, author = {Broniatowski, David A. and Tucker, Conrad}, }