Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Morinaga Yuta,Theoretical foundation of motivation management : External management and self-regulation of employees' motivation,The Rokkodai ronshu. Keieigaku-hen,13414933,Kobe University,2008-09,55,2,119-134,https://cir.nii.ac.jp/crid/1573668927046275840,