(1952). Social security in the central american countries: II, Social security seminar (San José, Costa Rica, 15-25 January 1951). International Labour Organization.
Citazione stile Chigago Style (17a edizione)Social Security in the Central American Countries: II, Social Security Seminar (San José, Costa Rica, 15-25 January 1951). International Labour Organization, 1952.
Citatione MLA (9a ed.)Social Security in the Central American Countries: II, Social Security Seminar (San José, Costa Rica, 15-25 January 1951). International Labour Organization, 1952.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.