APA (7th ed.) Citation

De George, R. T. (1971). A guide to philosophical bibliography and research. Appleton-Century-Crofts.

Chicago Style (17th ed.) Citation

De George, Richard T. A Guide to Philosophical Bibliography and Research. New York: Appleton-Century-Crofts, 1971.

MLA (9th ed.) Citation

De George, Richard T. A Guide to Philosophical Bibliography and Research. Appleton-Century-Crofts, 1971.