APA (7th ed.) Citation

McElroy, G. E. (1930). Ventilation of the large copper mines of Arizona. U.S. Govt. Print. Off..

Chicago Style (17th ed.) Citation

McElroy, George Edward. Ventilation of the Large Copper Mines of Arizona. Washington: U.S. Govt. Print. Off., 1930.

MLA (8th ed.) Citation

McElroy, George Edward. Ventilation of the Large Copper Mines of Arizona. U.S. Govt. Print. Off., 1930.

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