Kettelkamp, G. C. (1954). Teaching adolescents. Heath.
Cita Chicago (17th ed.)Kettelkamp, Gilbert Clarence. Teaching Adolescents. Boston: Heath, 1954.
Cita MLA (9th ed.)Kettelkamp, Gilbert Clarence. Teaching Adolescents. Heath, 1954.
Atenció: Aquestes cites poden no estar 100% correctes.