Cita APA (7th ed.)
(1949). The mature mind. W. W. Norton & Co..
Cita Chicago (17th ed.)
The Mature Mind. New York: W. W. Norton & Co., 1949.
Cita MLA (9th ed.)
The Mature Mind. W. W. Norton & Co., 1949.
Atenció: Aquestes cites poden no estar 100% correctes.