APA

Ryan J. H., . (1924). An introduction to philosophy. New York: The Macmillan company.

Chicago

Ryan James H, . 1924. An introduction to philosophy. New York: The Macmillan company.

Harvard

Ryan J. H., . (1924). An introduction to philosophy. New York: The Macmillan company.

MLA

Ryan James H, . An introduction to philosophy. New York: The Macmillan company. 1924.