Cita APA (7a ed.)

(1970). Population density by province 1970: Mindanao. s.n.].

Cita Chicago Style (17a ed.)

Population Density by Province 1970: Mindanao. [Manila: s.n.], 1970.

Cita MLA (9a ed.)

Population Density by Province 1970: Mindanao. s.n.], 1970.