Social Security System. Social Security Commission. (1961). 1961 annual report. Social Security Commission.
Cita Chicago (17th ed.)Social Security System. Social Security Commission. 1961 Annual Report. Manila: Social Security Commission, 1961.
Cita MLA (9th ed.)Social Security System. Social Security Commission. 1961 Annual Report. Social Security Commission, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.