APA (7th ed.) Citation

Phillips, J. D. (1997). Potential-field geophysical software for the PC, version 2.2 (Version 2.2.). U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Phillips, Jeffrey D. Potential-field Geophysical Software for the PC, Version 2.2. Version 2.2. Denver, CO: U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

MLA (9th ed.) Citation

Phillips, Jeffrey D. Potential-field Geophysical Software for the PC, Version 2.2. Version 2.2. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.