APA (7th ed.) Citation

East Texas Geological Society. Field Trip & East Texas Geological Society. (1945). East Texas Geological Society, Field Trip: [guidebook]. East Texas Geological Society.

Chicago Style (17th ed.) Citation

East Texas Geological Society. Field Trip and East Texas Geological Society. East Texas Geological Society, Field Trip: [guidebook]. [Tyler, Tex.]: East Texas Geological Society, 1945.

MLA (9th ed.) Citation

East Texas Geological Society. Field Trip and East Texas Geological Society. East Texas Geological Society, Field Trip: [guidebook]. East Texas Geological Society, 1945.