Thomas, W. I., & Thomas, D. S. (1928). The child in America; behavior problems and programs. A. A. Knopf.
Cita Chicago (17th ed.)Thomas, William Isaac, i Dorothy Swaine Thomas. The Child in America; Behavior Problems and Programs. New York: A. A. Knopf, 1928.
Cita MLA (9th ed.)Thomas, William Isaac, i Dorothy Swaine Thomas. The Child in America; Behavior Problems and Programs. A. A. Knopf, 1928.
Atenció: Aquestes cites poden no estar 100% correctes.