APA (7th ed.) Citation

Ryan, J. H. (1924). An introduction to philosophy. Macmillan.

Chicago Style (17th ed.) Citation

Ryan, James H. An Introduction to Philosophy. New York: Macmillan, 1924.

MLA (9th ed.) Citation

Ryan, James H. An Introduction to Philosophy. Macmillan, 1924.

Warning: These citations may not always be 100% accurate.