APA (7th ed.) Citation

Fröschels, E. (1947). The human race: A study in the nature of knowledge. Philosophical Library.

Chicago Style (17th ed.) Citation

Fröschels, Emil. The Human Race: A Study in the Nature of Knowledge. New York: Philosophical Library, 1947.

MLA (9th ed.) Citation

Fröschels, Emil. The Human Race: A Study in the Nature of Knowledge. Philosophical Library, 1947.