APA (7th ed.) Citation

McDonald, K. L., & Gunst, R. H. (1967). An analysis of the earth's magnetic field from 1835 to 1965. Institute for Earth Sciences.

Chicago Style (17th ed.) Citation

McDonald, Keith L., and Robert H. Gunst. An Analysis of the Earth's Magnetic Field from 1835 to 1965. Boulder, Colo.: Institute for Earth Sciences, 1967.

MLA (9th ed.) Citation

McDonald, Keith L., and Robert H. Gunst. An Analysis of the Earth's Magnetic Field from 1835 to 1965. Institute for Earth Sciences, 1967.