APA (7th ed.) Citation

Harper, W. G., & Torgerson, E. . . F. (1929). Soil survey of Columbia County, Oregon. U.S. Govt. Print. Off.

Chicago Style (17th ed.) Citation

Harper, William George, and E F. Torgerson. Soil Survey of Columbia County, Oregon. Washington: U.S. Govt. Print. Off, 1929.

MLA (9th ed.) Citation

Harper, William George, and E F. Torgerson. Soil Survey of Columbia County, Oregon. U.S. Govt. Print. Off, 1929.