Unesco. Progress of literacy in various countries: A preliminary statistical study of available census data since 1900. Unesco.
Stile di citazione ChicagoUnesco. Progress of Literacy in Various Countries: A Preliminary Statistical Study of Available Census Data Since 1900. Unesco.
Citazione MLAUnesco. Progress of Literacy in Various Countries: A Preliminary Statistical Study of Available Census Data Since 1900. Unesco.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.