APA (7th ed.) Citation

Ferrera, L. A. (1951). Philippines coal and its utilization. Bureau of Mines.

Chicago Style (17th ed.) Citation

Ferrera, Lauro A. Philippines Coal and Its Utilization. Manila: Bureau of Mines, 1951.

MLA (9th ed.) Citation

Ferrera, Lauro A. Philippines Coal and Its Utilization. Bureau of Mines, 1951.

Warning: These citations may not always be 100% accurate.