著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Reetta Oksa and Markus Kaakinen and Nina Savela and Jari J Hakanen and Atte Oksanen,Professional Social Media Usage and Work Engagement Among Professionals in Finland Before and During the COVID-19 Pandemic: Four-Wave Follow-Up Study,Journal of Medical Internet Research,1438-8871,JMIR Publications Inc.,2021-06-15,23,6,e29036,https://cir.nii.ac.jp/crid/1360857597259532672,https://doi.org/10.2196/29036