APA (7th ed.) Citation

O'Hara, N. W. (1981). Great Lakes region gravity and magnetic map sequence. Geological Society of America.

Chicago Style (17th ed.) Citation

O'Hara, Norbert W. Great Lakes Region Gravity and Magnetic Map Sequence. Boulder, Colo.: Geological Society of America, 1981.

MLA (9th ed.) Citation

O'Hara, Norbert W. Great Lakes Region Gravity and Magnetic Map Sequence. Geological Society of America, 1981.