APA (7th ed.) Citation

Eucken, R., & Phelps, M. S. (1880). The fundamental concepts of modern philosophic thought. D. Appleton and Company.

Chicago Style (17th ed.) Citation

Eucken, Rudolf, and M. Stuart Phelps. The Fundamental Concepts of Modern Philosophic Thought. New York: D. Appleton and Company, 1880.

MLA (9th ed.) Citation

Eucken, Rudolf, and M. Stuart Phelps. The Fundamental Concepts of Modern Philosophic Thought. D. Appleton and Company, 1880.