APA (7th ed.) Citation

Tweto, O. (1983). Geologic sections across Colorado. The Survey.

Chicago Style (17th ed.) Citation

Tweto, Ogden. Geologic Sections Across Colorado. Reston, Va.: The Survey, 1983.

MLA (9th ed.) Citation

Tweto, Ogden. Geologic Sections Across Colorado. The Survey, 1983.

Warning: These citations may not always be 100% accurate.