APA (7th ed.) Citation

McFarland, W. N. (1923). Magnetic declination in Arkansas in 1923. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

McFarland, W. N. Magnetic Declination in Arkansas in 1923. [Washington?]: U.S. Government Printing Office, 1923.

MLA (9th ed.) Citation

McFarland, W. N. Magnetic Declination in Arkansas in 1923. U.S. Government Printing Office, 1923.

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