Cita APA (7th ed.)

Corby, G. W. (1951). Geology and oil possibilities of the Philippines. Bureau of Print.

Cita Chicago (17th ed.)

Corby, Grant W. Geology and Oil Possibilities of the Philippines. Manila: Bureau of Print, 1951.

Cita MLA (9th ed.)

Corby, Grant W. Geology and Oil Possibilities of the Philippines. Bureau of Print, 1951.