Media type: E-Article Title: Revisiting the Theory of Transactional Distance: Implications for Open, Distance, and Digital Education in the 21st Century Contributor: Xiao, Junhong Published: Informa UK Limited, 2024 Published in: American Journal of Distance Education (2024), Seite 1-14 Language: English DOI: 10.1080/08923647.2024.2303328 ISSN: 0892-3647; 1538-9286 Keywords: Computer Science Applications ; Education Origination: Footnote: