SU , J. C., K. S. CHEN, and S. L. LAI. “An Application of Process Capability Indices in Swimming Teaching: 製程能力指標在游泳敎學的應用”. Asian Journal of Physical Education &Amp; Recreation, vol. 8, no. 1, June 2002, pp. 53-58, doi:10.24112/ajper.81262.