APA (7th ed.) Citation

Federated Copper Mines, Inc. Copper is still the world's most important metal next to iron. [publisher not identified].

Chicago Style (17th ed.) Citation

Federated Copper Mines, Inc. Copper Is Still the World's Most Important Metal Next to Iron. Manila: [publisher not identified].

MLA (9th ed.) Citation

Federated Copper Mines, Inc. Copper Is Still the World's Most Important Metal Next to Iron. [publisher not identified].