Evans, D. R. (1981). The planning of nonformal education. Unesco. International Institute for Educational Planning.
Citazione stile Chigago Style (17a edizione)Evans, David Russell. The Planning of Nonformal Education. Paris: Unesco. International Institute for Educational Planning, 1981.
Citatione MLA (9a ed.)Evans, David Russell. The Planning of Nonformal Education. Unesco. International Institute for Educational Planning, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.