APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.