Cita APA (7th ed.)

Philippines (Republic). Office of the President & Presidential Economic Staff. (1969). Provincial profile of Zamboanga del Norte. s.n.

Cita Chicago (17th ed.)

Philippines (Republic). Office of the President i Presidential Economic Staff. Provincial Profile of Zamboanga Del Norte. [Manila: s.n, 1969.

Cita MLA (9th ed.)

Philippines (Republic). Office of the President i Presidential Economic Staff. Provincial Profile of Zamboanga Del Norte. s.n, 1969.