APA (7th ed.) Citation

Jackson C. F. & Hedges J. H. (1939). Metal-mining practice. Washington, United States Government Printing Office, 1939.

Chicago Style (17th ed.) Citation

Jackson C. F. and Hedges J. H. Metal-mining Practice. Washington, United States Government Printing Office, 1939, 1939.

MLA (9th ed.) Citation

Jackson C. F. and Hedges J. H. Metal-mining Practice. Washington, United States Government Printing Office, 1939, 1939.

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