APA (7th ed.) Citation

Geological Society of America. (1959). Guidebook for field trips, Pittsburgh meeting, 1959. Geological Society of America.

Chicago Style (17th ed.) Citation

Geological Society of America. Guidebook for Field Trips, Pittsburgh Meeting, 1959. [New York]: Geological Society of America, 1959.

MLA (9th ed.) Citation

Geological Society of America. Guidebook for Field Trips, Pittsburgh Meeting, 1959. Geological Society of America, 1959.