APA (7th ed.) Citation

Hutchins, R. M., & Adler, M. J. (1963). Gateway to the great books. Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

Hutchins, Robert Maynard, and Mortimer Jerome Adler. Gateway to the Great Books. Chicago: Encyclopaedia Britannica, 1963.

MLA (9th ed.) Citation

Hutchins, Robert Maynard, and Mortimer Jerome Adler. Gateway to the Great Books. Encyclopaedia Britannica, 1963.