APA (7th ed.) Citation

Powell, J. A. (1976). An electromagnetic system for detecting and locating trapped miners. U.S. Dept. of Commerce, Bureau of Mines.

Chicago Style (17th ed.) Citation

Powell, James A. An Electromagnetic System for Detecting and Locating Trapped Miners. Washington: U.S. Dept. of Commerce, Bureau of Mines, 1976.

MLA (9th ed.) Citation

Powell, James A. An Electromagnetic System for Detecting and Locating Trapped Miners. U.S. Dept. of Commerce, Bureau of Mines, 1976.