Yussen Steven R. (1998). Child development: An Introduction. Wm. C. Brown.
Cita Chicago (17th ed.)Yussen Steven R. Child Development: An Introduction. Lowa: Wm. C. Brown, 1998.
Cita MLA (9th ed.)Yussen Steven R. Child Development: An Introduction. Wm. C. Brown, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.