Korten, D. C. (1990). Getting to the 21st century: Voluntary action and the global agenda. Kumarian Press.
Chicago-viite (17. p.)Korten, David C. Getting to the 21st Century: Voluntary Action and the Global Agenda. West Hartford, Conn: Kumarian Press, 1990.
MLA-viite (9. p.)Korten, David C. Getting to the 21st Century: Voluntary Action and the Global Agenda. Kumarian Press, 1990.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.