* {{cite book | last=Education | first=Unesco. Division of Statistics on | title=Compendio de Estadísticas Relativas Al Analfabetismo | publisher=Division of Statistics on Education, Office of Statistics, Unesco | publication-place=Paris | date=1988 | isbn=92-3-002580-1}}
<ref name="r875">{{cite book | last=Education | first=Unesco. Division of Statistics on | title=Compendio de Estadísticas Relativas Al Analfabetismo | publisher=Division of Statistics on Education, Office of Statistics, Unesco | publication-place=Paris | date=1988 | isbn=92-3-002580-1 | page=}}</ref>