Corby, G. W. (1951). Geology and oil possibilities of the Philippines. Bureau of Print.
Citazione stile Chigago Style (17a edizione)Corby, Grant W. Geology and Oil Possibilities of the Philippines. Manila: Bureau of Print, 1951.
Citatione MLA (9a ed.)Corby, Grant W. Geology and Oil Possibilities of the Philippines. Bureau of Print, 1951.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.