Cita APA (7th ed.)
De-Ford, R. K. (1958). Tertiary Formations of Rim Rock Country, Presidio County, Trans-Pecos Texas.
Cita Chicago (17th ed.)
De-Ford, Ronald K. Tertiary Formations of Rim Rock Country, Presidio County, Trans-Pecos Texas. Austin, 1958.
Cita MLA (9th ed.)
De-Ford, Ronald K. Tertiary Formations of Rim Rock Country, Presidio County, Trans-Pecos Texas. 1958.
Atenció: Aquestes cites poden no estar 100% correctes.