Seifert, K. L. (1987). Child and adolescent development. Houghton Mifflin.
Cita Chicago (17th ed.)Seifert, Kelvin L. Child and Adolescent Development. Houghton Mifflin, 1987.
Cita MLA (9th ed.)Seifert, Kelvin L. Child and Adolescent Development. Houghton Mifflin, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.