Association for Supervision and Curriculum Development. (1968). Youth education: Problems, perspectives, promises. s.n.
Cita Chicago (17th ed.)Association for Supervision and Curriculum Development. Youth Education: Problems, Perspectives, Promises. Washington, D.C: s.n, 1968.
Cita MLA (9th ed.)Association for Supervision and Curriculum Development. Youth Education: Problems, Perspectives, Promises. s.n, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.