Tappan, P. W. (1949). Juvenile delinquency. McGraw-Hill Book Co..
Cita Chicago (17th ed.)Tappan, Paul W. Juvenile Delinquency. New York: McGraw-Hill Book Co., 1949.
Cita MLA (9th ed.)Tappan, Paul W. Juvenile Delinquency. McGraw-Hill Book Co., 1949.
Atenció: Aquestes cites poden no estar 100% correctes.