Social Security System. Social Security Commission. (1961). 1961 annual report. Social Security Commission.
Chicago Style aipamenaSocial Security System. Social Security Commission. 1961 Annual Report. Manila: Social Security Commission, 1961.
MLA aipamenaSocial Security System. Social Security Commission. 1961 Annual Report. Social Security Commission, 1961.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.