APA (7th ed.) Citation

Barnes, V. E., Goldich, S. S., & Romberg, F. (1949). Iron ore in the Llano region, central Texas. [publisher not identified].

Chicago Style (17th ed.) Citation

Barnes, Virgil E., Samuel S. Goldich, and Frederick Romberg. Iron Ore in the Llano Region, Central Texas. [Austin]: [publisher not identified], 1949.

MLA (9th ed.) Citation

Barnes, Virgil E., et al. Iron Ore in the Llano Region, Central Texas. [publisher not identified], 1949.