APA (7th ed.) Citation

Campbell, K., & Hartshorn, J. H. (1980). Surficial geologic map of the Northfield quadrangle, Massachusetts, New Hampshire, and Vermont. The Survey.

Chicago Style (17th ed.) Citation

Campbell, K., and Joseph H. Hartshorn. Surficial Geologic Map of the Northfield Quadrangle, Massachusetts, New Hampshire, and Vermont. Reston, Va.: The Survey, 1980.

MLA (9th ed.) Citation

Campbell, K., and Joseph H. Hartshorn. Surficial Geologic Map of the Northfield Quadrangle, Massachusetts, New Hampshire, and Vermont. The Survey, 1980.