Zawacki-Richter. (2019). Open and Distance Education in Asia, Africa and the Middle East (1.). Springer Singapore.
Chicago-viite (17. p.)Zawacki-Richter. Open and Distance Education in Asia, Africa and the Middle East. 1. Springer Singapore, 2019.
MLA-viite (8. p.)Zawacki-Richter. Open and Distance Education in Asia, Africa and the Middle East. 1. Springer Singapore, 2019.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.