APA (7th ed.) Citation

Roberts, E. R. (1950). The extraction of non-ferrous metals / by E.R. Roberts. Temple.

Chicago Style (17th ed.) Citation

Roberts, E. R. The Extraction of Non-ferrous Metals / by E.R. Roberts. Temple, 1950.

MLA (9th ed.) Citation

Roberts, E. R. The Extraction of Non-ferrous Metals / by E.R. Roberts. Temple, 1950.

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