APA (7th ed.) Citation

Newman, J. H., & Gilson, É. (1955). An essay in aid of a grammar of assent. Image Books.

Chicago Style (17th ed.) Citation

Newman, John Henry, and Étienne Gilson. An Essay in Aid of a Grammar of Assent. New York: Image Books, 1955.

MLA (9th ed.) Citation

Newman, John Henry, and Étienne Gilson. An Essay in Aid of a Grammar of Assent. Image Books, 1955.

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