APA (7th ed.) Citation

Sokoloff, B. (1938). Middle age is what you make it. The Greystone press.

Chicago Style (17th ed.) Citation

Sokoloff, Boris. Middle Age Is What You Make It. New York: The Greystone press, 1938.

MLA (9th ed.) Citation

Sokoloff, Boris. Middle Age Is What You Make It. The Greystone press, 1938.