Unesco. Progress of literacy in various countries: A preliminary statistical study of available census data since 1900. Unesco.
Chicago-Zitierstil (17. Ausg.)Unesco. Progress of Literacy in Various Countries: A Preliminary Statistical Study of Available Census Data Since 1900. Unesco.
MLA-Zitierstil (8. Ausg.)Unesco. Progress of Literacy in Various Countries: A Preliminary Statistical Study of Available Census Data Since 1900. Unesco.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.