APA (7th ed.) Citation

Ratzlaff, C. J. (1936). The theory of free competition. University of Pennsylvania press; H. Milford, Oxford university press.

Chicago Style (17th ed.) Citation

Ratzlaff, Carl Johann. The Theory of Free Competition. Philadelphia : London: University of Pennsylvania press; H. Milford, Oxford university press, 1936.

MLA (9th ed.) Citation

Ratzlaff, Carl Johann. The Theory of Free Competition. University of Pennsylvania press; H. Milford, Oxford university press, 1936.