APA (7th ed.) Citation

Sierra, J., & O'Gorman, E. (1969). The political evolution of the Mexican people. University of Texas Press.

Chicago Style (17th ed.) Citation

Sierra, Justo, and Edmundo O'Gorman. The Political Evolution of the Mexican People. Austin: University of Texas Press, 1969.

MLA (9th ed.) Citation

Sierra, Justo, and Edmundo O'Gorman. The Political Evolution of the Mexican People. University of Texas Press, 1969.