APA (7th ed.) Citation

Kiessling, O. E. (1939). Technology, employment, and output per man in petroleum and natural-gas production. Work Projects Administration, National Research Project : Department of the Interior, Bureau of Mines.

Chicago Style (17th ed.) Citation

Kiessling, O. E. Technology, Employment, and Output Per Man in Petroleum and Natural-gas Production. Philadelphia, Pennsylvania: Work Projects Administration, National Research Project : Department of the Interior, Bureau of Mines, 1939.

MLA (9th ed.) Citation

Kiessling, O. E. Technology, Employment, and Output Per Man in Petroleum and Natural-gas Production. Work Projects Administration, National Research Project : Department of the Interior, Bureau of Mines, 1939.