Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Robert Sanders,THE PARETO PRINCIPLE: ITS USE AND ABUSE,Journal of Services Marketing,0887-6045,Emerald,1987-02-01,1,2,37-40,https://cir.nii.ac.jp/crid/1360857596221329024,https://doi.org/10.1108/eb024706