Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 藤崎 実 and フジサキ ミノル and Minoru Fujisaki,Why do ambassadors give free endorsements? : A qualitative reserch: motives behind ambassador programs,立教ビジネスデザイン研究,13493701,dummy publisher,2016,13,,57-69,https://cir.nii.ac.jp/crid/1390009224785887232,https://doi.org/10.14992/00014190