APA (7th ed.) Citation

Dubray, C. A. (1921). Introductory philosophy: A text-book for colleges and high schools. Longmans.

Chicago Style (17th ed.) Citation

Dubray, Charles A. Introductory Philosophy: A Text-book for Colleges and High Schools. New York: Longmans, 1921.

MLA (9th ed.) Citation

Dubray, Charles A. Introductory Philosophy: A Text-book for Colleges and High Schools. Longmans, 1921.

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