APA (7th ed.) Citation

Geological Survey (U.S.). (1969). State of Oregon (Ed. of 1966.). The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). State of Oregon. Ed. of 1966. Washington, D.C.: The Survey, 1969.

MLA (9th ed.) Citation

Geological Survey (U.S.). State of Oregon. Ed. of 1966. The Survey, 1969.