APA (7th ed.) Citation

Geological Survey (U.S.), Peddie, N. W., & Zunde, A. K. (1988). The magnetic field of the earth-1985: Inclination chart. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Norman W. Peddie, and Audronis K. Zunde. The Magnetic Field of the Earth-1985: Inclination Chart. Reston, Va.: The Survey, 1988.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. The Magnetic Field of the Earth-1985: Inclination Chart. The Survey, 1988.