Cita APA (7th ed.)

Philippines (Republic). Government Service Insurance System. (1970). Basic reference manual. [s.n.].

Cita Chicago (17th ed.)

Philippines (Republic). Government Service Insurance System. Basic Reference Manual. Manila: [s.n.], 1970.

Cita MLA (9th ed.)

Philippines (Republic). Government Service Insurance System. Basic Reference Manual. [s.n.], 1970.