APA (7th ed.) Citation

(1932). Magnetic declination in North Carolina in 1930. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Magnetic Declination in North Carolina in 1930. [Washington?]: U.S. Government Printing Office, 1932.

MLA (9th ed.) Citation

Magnetic Declination in North Carolina in 1930. U.S. Government Printing Office, 1932.

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