APA (7th ed.) Citation

Eifler, G. K. (1950). Geology of the Barrilla Mountains, Texas. [publisher not identified].

Chicago Style (17th ed.) Citation

Eifler, Gus Kearney. Geology of the Barrilla Mountains, Texas. [Austin]: [publisher not identified], 1950.

MLA (9th ed.) Citation

Eifler, Gus Kearney. Geology of the Barrilla Mountains, Texas. [publisher not identified], 1950.