APA (7th ed.) Citation

Udden, J. A. (1919). Aids to identification of geological formations. University of Texas.

Chicago Style (17th ed.) Citation

Udden, Johan August. Aids to Identification of Geological Formations. Austin: University of Texas, 1919.

MLA (9th ed.) Citation

Udden, Johan August. Aids to Identification of Geological Formations. University of Texas, 1919.

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