Hayes, Andrew F. “Beyond Baron and Kenny: Statistical Mediation Analysis in the New Millennium”. Communication Monographs, vol. 76, no. 4, 2009, pp. 408-20, https://doi.org/10.1080/03637750903310360.
Hayes, A. F. (2009). Beyond Baron and Kenny: Statistical Mediation Analysis in the New Millennium. Communication Monographs, 76(4), 408-420. https://doi.org/10.1080/03637750903310360
Hayes AF. Beyond Baron and Kenny: Statistical Mediation Analysis in the New Millennium. Communication Monographs. 2009;76(4):408-20.