Freiberg, K. L. (1998). Human development 98/99 (26th ed.). Dushkin/McGraw-Hill.
Cita Chicago Style (17a ed.)Freiberg, Karen L. Human Development 98/99. 26th ed. Guilford, Conn: Dushkin/McGraw-Hill, 1998.
Cita MLA (9a ed.)Freiberg, Karen L. Human Development 98/99. 26th ed. Dushkin/McGraw-Hill, 1998.
Precaución: Estas citas no son 100% exactas.