APA (7th ed.) Citation

Allen, F. L. (1931). Only yesterday: An informal history of the nineteen-twenties. Blue Ribbon Books.

Chicago Style (17th ed.) Citation

Allen, Frederick Lewis. Only Yesterday: An Informal History of the Nineteen-twenties. New York: Blue Ribbon Books, 1931.

MLA (9th ed.) Citation

Allen, Frederick Lewis. Only Yesterday: An Informal History of the Nineteen-twenties. Blue Ribbon Books, 1931.