APA (7th ed.) Citation

Keyes, H. E. (1930). Innovations in copper leaching employing ferric sulphate-sulphuric acid. Bulletin of United States Bureau of Mines, 321, 1.

Chicago Style (17th ed.) Citation

Keyes, H. E. "Innovations in Copper Leaching Employing Ferric Sulphate-sulphuric Acid." Bulletin of United States Bureau of Mines 321 (1930): 1.

MLA (9th ed.) Citation

Keyes, H. E. "Innovations in Copper Leaching Employing Ferric Sulphate-sulphuric Acid." Bulletin of United States Bureau of Mines, vol. 321, 1930, p. 1.