Lua APA (7ú heag.)
Clavijo, S. (2009). Social security reforms in Colombia: Striking demographic and fiscal balances. International Monetary Fund.
Lua i Stíl Chicago (17ú heag.)
Clavijo, Sergio. Social Security Reforms in Colombia: Striking Demographic and Fiscal Balances. [Washington D.C.]: International Monetary Fund, 2009.
Lua MLA (9ú heag.)
Clavijo, Sergio. Social Security Reforms in Colombia: Striking Demographic and Fiscal Balances. International Monetary Fund, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.