Hazard, D. L. (1937). Magnetic declination in the United States 1935 by Daniel L. Hazard and W. N. McFarland. Government Printing Office.
Chicago-Zitierstil (17. Ausg.)Hazard, Daniel L. Magnetic Declination in the United States 1935 by Daniel L. Hazard and W. N. McFarland. Washington: Government Printing Office, 1937.
MLA-Zitierstil (9. Ausg.)Hazard, Daniel L. Magnetic Declination in the United States 1935 by Daniel L. Hazard and W. N. McFarland. Government Printing Office, 1937.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.