APA (7th ed.) Citation

Turner, S. (1930). Mining bituminous coal by stripping methods, presented at 2nd World Power Conference, Berlin, 1930. [publisher not identified].

Chicago Style (17th ed.) Citation

Turner, Scott. Mining Bituminous Coal by Stripping Methods, Presented at 2nd World Power Conference, Berlin, 1930. Washington, D.C.: [publisher not identified], 1930.

MLA (9th ed.) Citation

Turner, Scott. Mining Bituminous Coal by Stripping Methods, Presented at 2nd World Power Conference, Berlin, 1930. [publisher not identified], 1930.