APA (7th ed.) Citation

Boyer, W. T., & Wartman, F. S. (1930). Form of copper in converter slag. [publisher not identified].

Chicago Style (17th ed.) Citation

Boyer, W. T., and Frank S. Wartman. Form of Copper in Converter Slag. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Boyer, W. T., and Frank S. Wartman. Form of Copper in Converter Slag. [publisher not identified], 1930.