(1977). The economics of new educational media: Present status of research and trends. Unesco.
Citazione stile Chigago Style (17a edizione)The Economics of New Educational Media: Present Status of Research and Trends. London: Unesco, 1977.
Citatione MLA (9a ed.)The Economics of New Educational Media: Present Status of Research and Trends. Unesco, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.