APA (7th ed.) Citation

Philippines (Republic). Government Service Insurance System. (1958). Know your GSIS. [s.n.].

Chicago Style (17th ed.) Citation

Philippines (Republic). Government Service Insurance System. Know Your GSIS. Manila: [s.n.], 1958.

MLA (9th ed.) Citation

Philippines (Republic). Government Service Insurance System. Know Your GSIS. [s.n.], 1958.