Valverde, F. D. (2002). Anti-poverty programmes in Costa Rica: The non-contributory pension scheme. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Valverde, Fabio Durán. Anti-poverty Programmes in Costa Rica: The Non-contributory Pension Scheme. International Labour Organization, 2002.
Citatione MLA (9a ed.)Valverde, Fabio Durán. Anti-poverty Programmes in Costa Rica: The Non-contributory Pension Scheme. International Labour Organization, 2002.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.