(1968). About the Sudbury Valley School. Sudbury Valley School.
Cita Chicago (17th ed.)About the Sudbury Valley School. [Framingham]: Sudbury Valley School, 1968.
Cita MLA (8th ed.)About the Sudbury Valley School. Sudbury Valley School, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.