UNESCO. (1999). Adult learning and the challenges of the 21st century. UNESCO.
Chicago-stil citatUNESCO. Adult Learning and the Challenges of the 21st Century. Germany: UNESCO, 1999.
MLA-referensUNESCO. Adult Learning and the Challenges of the 21st Century. UNESCO, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.