APA (7th ed.) Citation

Keller, H. R. (1929). The reader's digest of books. The Macmillan Company.

Chicago Style (17th ed.) Citation

Keller, Helen Rex. The Reader's Digest of Books. New York: The Macmillan Company, 1929.

MLA (9th ed.) Citation

Keller, Helen Rex. The Reader's Digest of Books. The Macmillan Company, 1929.