Cita APA (7th ed.)

Surigao del Norte. Office of the Governor. (1970). Economic atlas of Surigao del Norte, 1970. s.n.].

Cita Chicago (17th ed.)

Surigao del Norte. Office of the Governor. Economic Atlas of Surigao Del Norte, 1970. [Surigao: s.n.], 1970.

Cita MLA (9th ed.)

Surigao del Norte. Office of the Governor. Economic Atlas of Surigao Del Norte, 1970. s.n.], 1970.