APA (7th ed.) Citation

Duke, J. T., Ashcraft, A., Bayliss, G., Schmidt, H., & Shafer, H. (1980). The Ouachita Basin, an early history.

Chicago Style (17th ed.) Citation

Duke, John Thomas, Allan Ashcraft, Garland Bayliss, Henry Schmidt, and Harry Shafer. The Ouachita Basin, an Early History. 1980.

MLA (9th ed.) Citation

Duke, John Thomas, et al. The Ouachita Basin, an Early History. 1980.